I recall a few particular snap stories where they went out to Justin's new house and were shooting guns, throwing axes and generally doing fun outdoor stuff. I do seem to recall at some point there was talk about survivalist stuff in those snaps.
I've done quite a lot of survival training with the US Government and have been in places where people lived by those skills daily. I have to say that the majority of what these guys are doing, and what most "rich guy" survivalists do, as indicated by this story, is mostly worthless. Especially long term.
There's a hat tip to the most important part, forming groups and all the rest of the community building work, which is not inappropriate, but it's missing the point where you basically do that now with a diverse set of people - not just your rich friends - which is actually a sustainable strategy.
There's a lot to nitpick here but I guess the most interesting thing to me is that, for all their wealth, access and smarts, none of these people seem to actually be trying to solve the systematic and endemic problems which would soften the blow of a major existential risk.
In that sense Levchin and Johnson are 100% on the money here with investing in structural improvement, not some temporary escape plan that doesn't survive first contact with a handful of real actual killers.