Ben's strongest point is in asking "Why now?" Options have been this way since the 80s. What's changed? Nobody is examining that as closely as they should. Maybe most of us are young and hubristic and tend to discount the past. But as engineers we should all possess a certain conservatism, a healthy skepticism to changing systems that have been stable for a long time. We must look closely to ensure there are no unintended consequences.
I think it is very notable that Sam Altman said he has revised his position to require stronger incentives to stay. Early stage startups need incentives to stick together as a team. If you don't have any extra protections at the earliest stage, then you're going to have smart, happy employees face the powerful economic logic of leaving to diversify their options portfolio. And that's not good for the value of anyone's options.