This is what Bolt was trying to solve. They did it the wrong way and hurt a lot of people, but they were trying to give people the opportunity to exercise early.
The correct answer is a 10-year extended window. It's not perfect, and there are downsides. But it's (currently) the fairest way to issue stock options to employees. By the time it comes time to exercise, the employee will be significantly de-risked because they'll know how the company is doing.