I don't think the graded vesting was the surprising thing to the parent comment, it's that it's five years instead of four. All the tech companies I've seen us

I don't think the graded vesting was the surprising thing to the parent comment, it's that it's five years instead of four. All the tech companies I've seen use 1 year cliff/4 year total vesting. Ie, 25% after the first year, 1/36th of the remainder monthly.