I really do wonder if any of those rock star $100m++ hires managed to get a 9-figure sign-on bonus, or if the majority have year(s) long performance clauses. Imagine being paid generational wealth, and then the house of cards comes crashing down a couple of months later.
I'm sure everyone is doing just fine financially, but I think it's common knowledge that these kind of comp packages are usually a mix of equity and cash earned out over multiple years with bonuses contingent on milestones, etc. The eye-popping top-line number is insane but it's also unlikely to be fully realized.
In essence, they have left stellar projects with huge money potential for the corporate rat race, albeit at important $.