There is no legal reason why we can't have non-dilutable options. The only reason why it's such common practice is probably vanity (investors want to know they

There is no legal reason why we can't have non-dilutable options. The only reason why it's such common practice is probably vanity (investors want to know they're getting X% when they invest) and the complexity of planning your fundraising schedule at the day of founding. Probably mostly the latter.