What I was most struck by in the conversation is that Zuck is actually doing some of the things Cowen advocates - policy experimentation, taking on long-term projects with uncertain payoffs, etc. at CZI.

I'm a huge fan of Patrick Collison and know that Stripe is also doing tons of experimentation and product innovation, but I was struck by how much less like an academic Zuck sounded. I don't know if it's a good or bad thing, but Cowen and Collison seem to focus on what everyone should be doing, while Zuck's focus is on what he, personally, can get done (again, caveat being that Collison is simply so well-read that he comes off as an academic, while I'm aware that in reality he's doing a ton himself as well).