Equity is basically always monopoly, you generally can't even evaluate its value because no one will show you the cap table. Highly profitable startups still regularly manage to deliver a pittance to early employees on exit. Even if the exit does deliver oftentimes the yearly compensations disparity is so large that if they'd just stayed at BigCo and invested the bulk of their earnings they would have earned as much or more. This is all while working significantly more hours per year.
The list of upsides is really small relative to the risk. If startups want talent the industry norms are going to have to change.
