The risk, and I see that currently in non-software functions, is hiring people from big corps that know how to manage the people that solved those scale/... problems instead of the problems themselves. With the result that those senior people default back to building an organization that looks like the one they are used to. Which doesn't solve a single one of those solved problems.

Quite likely to happen of the founders / existing hiring managers have no idea themselves how big corp solved these problems.