Lenny's Podcast: Product | Career | Growth
01:26:37 · Caitlin Kalinowski, Lenny Rachitsky
And having him and Andrew Bosworth, the CTO, involved in the technical decisions, able to read reports that were maybe 20 pages long, [inaudible 01:26:52] the trade-offs, understand them and be able to contribute to the technical discussion, and that's just on my thing that week and they're doing that a hundred times that month, was impressive and definitely something I learned from them. [01:27:05] S1: What an incredible set of experiences and different types of places to work. I don't know if they could be more different, all these places. [01:27:13] S0: I know. And I think that that's why I'm looking for this zero to one. And so when you're looking for a zero to one opportunity, it's always going to be in some place different generally. [01:27:24] S1: You're going to be a hot commodity in this market now that you're a free agent, but on the flip side of that, I want to take us to Fail Corner. I feel like someone building hardware physical things has some great fail stories. Is there one story of something you built, something you worked on that failed and something you learned from that experience?
01:27:44 · Caitlin Kalinowski, Lenny Rachitsky
[01:27:44] S0: This is a great question and not a comfortable one. One of my favorite failures was actually on the Quest 2. It was around EVT, so halfway through the Quest 2, and we found out that we had gone from five cameras to four for cost reduction. We talked a little about this. We needed to reduce the price so more people could buy them. And what happened was it was right before Christmas and I heard from the lead on the team that does computer vision and he said, "Oh my gosh, the data from the cameras isn't working and we can't get a lock on where the person is using the headset." And so we looked into it and we realized that their interpretation of our spec and our interpretation of our spec was different. So in engineering, we usually use a plus or minus, like it can go up or down by, in this case I think it was 0.15mm or something like that. And in his world, he was used to having a global, it's within 0.15mm. And so we had a different interpretation of the spec. Now the problem is that our interpretation of the spec meant that he couldn't meet his goals of being able to understand where the headset was in space. And so we had to do a redesign and this is at EVT. So this is pretty much when you want the engineering to be done. [01:29:09] S1: What does EVT stand for?
01:29:09 · Lenny Rachitsky, Caitlin Kalinowski
[01:29:09] S1: What does EVT stand for? [01:29:11] S0: It stands for when we compile the hardware for the first time with everything that's supposed to be done. So final components, final materials, you're making the components on the tools, you're going to make them for mass production instead of just machining them. So it's a big deal. And so what we had to do was favor or prioritize. We had four floating cameras. We had to lock the bottom two to each other and put them on a bracket so that the relative distance from them met the spec that he needed and then let the other two float. So this was an architectural change. And this was a failure. I mean, it was a failure in understanding the spec. It was a failure in essentially the product design, but it was because of a misunderstanding of the spec. And so we were able to adapt. We actually kept the build on time and we actually shipped the product on time, but it was really stressful. And it turned out that actually the new design was better because with a favored pair, you have source of truth for the space and then the other two cameras overlap onto that source of truth. And so it worked well. I thought it was a good outcome, but it was a scramble and certainly wish that we caught it four months earlier. [01:30:30] S1: Another example of just how hard hardware is, just like you mess up a spec and like, all right, here, we wasted a week building something that didn't work and now it's like four months later still having to redo the hardware supply chain. [01:30:41] S0: Yeah. It was tricky.
01:30:41 · Caitlin Kalinowski, Lenny Rachitsky
[01:30:41] S0: Yeah. It was tricky. [01:30:43] S1: So the Quest 2 that shipped was this with the cameras moved. [01:30:47] S0: Yeah. If you look, the cameras have, there's two cameras a little closer to one another in the front of the Quest than at the bottom. [01:30:53] S1: Wow. How did Bos and Zuck feel about this? [01:30:59] S0: The fact that I don't remember probably means it was okay. I think we addressed it, we redesigned it. We had to change the material and the bracket. I think we had to make steel to hold the tolerance we needed. But it worked out and the price and the cost and yields were fine. So I think we adapted. [01:31:18] S1: And that was the bestselling VR device of all time. Is that right? [01:31:21] S0: I think it was. [01:31:21] S1: Okay. [01:31:22] S0: I don't have the final sales numbers, but yeah. [01:31:24] S1: Okay [inaudible 01:31:25]. Okay. Caitlin, we've covered so much ground. Is there anything else you wanted to share? Anything else you want to leave listeners with? Either double down something we've shared or anything else that's just like, "Oh, here's something I want to share."
01:31:24 · Lenny Rachitsky, Caitlin Kalinowski
[01:31:24] S1: Okay [inaudible 01:31:25]. Okay. Caitlin, we've covered so much ground. Is there anything else you wanted to share? Anything else you want to leave listeners with? Either double down something we've shared or anything else that's just like, "Oh, here's something I want to share." [01:31:38] S0: I think that this is probably one of the most exciting times we're coming into, and it's normal I think for all of us, myself included, to be worried and scared about it, but I also think it's an opportunity for people to have an extraordinary amount of progress and be able to as an individual do more than we've ever done before. And so that's the side I'm trying to embrace. These new tools, this new way of work is scary, but if you embrace it and are daily using these AI tools right now and daily applying them to what you're doing, you'll be at the forefront of whatever comes next. And so I just want to encourage everyone to be creative, use these tools, have fun with them, figure out what the boundaries are, and then every time a new model comes out, test again because it's really important to know what we're dealing with and where these boundaries are. But I've never been more excited about the power of an individual. [01:32:35] S1: Well, with that, Caitlin, we've reached our very exciting lightning round. I've got five questions for you. Are you ready? [01:32:41] S0: I'm ready. [01:32:42] S1: First question, what are two or three books that you find yourself recommending most to other people?
01:32:42 · Lenny Rachitsky, Caitlin Kalinowski
[01:32:42] S1: First question, what are two or three books that you find yourself recommending most to other people? [01:32:46] S0: I've been mostly reading the classics lately. Book of the New Sun is a great fiction book, which I really recommend. I think that's what it's called. I haven't read it in a little while. I love Mrs. Dalloway. Actually, I think it's a very interesting book about transitions, and it was a post-war book by Virginia Woolf. So I really love it and I think it's really wonderful. I think Herodotus Histories is pretty incredible. He's wrong a lot, but he's also, it's the first history book and in many cases he's going and finding firsthand or secondhand accounts of what happens. It's a way to look into the world at a completely different era than it is now. So these are some books that I like, and I'll double check the title of the first one and email you, but I think that's what it's called. [01:33:36] S1: Okay. And we'll link to the correct one in the show notes. Favorite recent movie or TV show that you have really enjoyed? [01:33:43] S0: I'm really into Euphoria right now. I think the new Euphoria, I'm interested in the characters and figuring that out, what's going to happen there. [01:33:56] S1: That show's so stressful whenever I watch. [01:33:59] S0: It's a melodrama. I think you have to think about it as a soap opera and then it's fun. If you think about it too literally or practically-