The hardest thing about pivots (major shifts in company/product direction) isn't just the actual pivot. It's the courage to make the decision... and being honest with yourself as a CEO. Especially since, no matter how great the team or board or even customers may be, it's lonely: You're the only one in the position to synthesize the knowledge; nobody else has the data and the insight put together in the same way. And sigh, "pivot" has also become such an overused word, it's certainly lost nuance, and perhaps even meaning. So what does "pivoting" a startup really mean? For decision making? Timing (or time left until you run out of cash)? Culture? Are things different for so-called “hard tech” or deep research-based startups? Finally, how do you know when things are working, that you really do have product-market fit? a16z co-founder Ben Horowitz and Lytro CEO Jason Rosenthal discuss (in conversation with Sonal Chokshi) all this and more in this episode of the a16z podcast, sharing war stories and lessons learned. Both witnessed first-hand -- and drove -- pivots: Jason watching Ben at Loudcloud/Opsware post-IPO, and conversely, Ben watching Jason at Lytro. Maybe, all startups -- and ultimately, successful companies -- are really just a series of pivots...

Thanks to freeways, cities became something to get through instead of something to get to. Now, as the next transportation revolution -- from rivers to trains to cars to autonomous cars -- promises to change the face of our cities, what happens to car culture, infrastructure, and more? Who owns what, who pays? And what about the design -- and product management -- challenges, whether it's designing for user trust, city adoption, or an ever-moving target thanks to constantly evolving tech? This episode of the podcast (in conversation with Sonal) covers all this and more, featuring: a16z's Frank Chen, who recently shared 16 questions about autonomous cars; Taggart Matthiesen, director of product at Lyft who covers the core platform as well as development/strategy for autonomous vehicles; and Carl Pope, former executive director and chairman of the Sierra Club -- and author (with former NYC mayor Mike Bloomberg) of the upcoming book Climate of Hope: How Cities Businesses and Citizens Can Save the Planet. Will curb space be the new shelf space? When we value the "iPhone-ness" over the "carness" of cars, what changes? And... will we all drive less, walk more?