It also can’t be overstated just how expensive things have gotten. I’d wager a large percentage of the exercise decline is due to employees having less cash.
Right now, like maybe Stripe is worth taking the risk to exercise, and Clubhouse borderline because they have $100m in funding. But most other early stage companies, there’s much bigger risk that the company’s projections look ok to the employee so they exercise. But then the existing funding busts and then the employee ends up paying taxes on something that’s worthless. And the bankers / VCs likely had the info to know it was worthless at the time of exercise.