I heard a rumor that Stripe recently changed their initial RSU grant. Now the value is fixed, you get $x worth of stock every year. So new hires lose out on a lot of the upside from stock growth.
I don't believe that's how RSUs work at Stripe (or anywhere). On hiring, you get 5000 RSUs (or whatever the number), and after time vesting, they convert into stock. New hires gain a lot of the upside from stock growth, even with RSUs.