Anecdotally, I think it already is. Part of it is simply because the younger you are, the less risk you can take with the cost of housing the way that it is. Older people/Millenials often have housing security and can take more risks this way, plus the other factors you raised.

Can't speak to whether that's universally true, but it's something I've been seeing: including people in their late 30s to mid 40s leaving cushy well paying corporate jobs to try founder life: they have big nest eggs from said previous jobs, so why not!