There is no way he would have built the CRM as quickly pre-AI.
He built, in a few months, what would have taken maybe one to two years before.
It's probably going to be a while before someone builds the next Instagram with AI. But I think that's more a function of product fit and idea. Less so how fast one person can code.
The first billion-dollar solopreneur likely is going to happen at some point, but it's still a one-in-a-million shot, no matter how fast a person can code.
Look at how many startups fail despite plenty of money for programmers.
But I am seeing friends get to revenue faster with AI on small ideas.