They were and remain big crypto investors and it's pretty weird that the essay doesn't acknowledge how much talent and money crypto sucked up. He asks where the supersonic aircraft are and - ignoring that they have awful externalities - there is actually a supersonic jet startup. A16Z hasn't invested in Boom, though, near as I can tell.
A16Z is a leading venture fund - if anyone's gonna build the future, they could use A16Z's money. So why is so much of what Andreesen wants from the future not what they've invested in?