Depends on how well they translate that effort into promotions or company switches into better positions.

I averaged around 18mo to either a promotion or a move in my 20s, mostly off the back of working harder (to get the promotions/comp increases) and working smarter (to work out when they aren't coming and jumping somewhere else).

If this makes sense for someone has a lot more to do with their ambition/desire and ability to work the system than anything else. It also helps a ton if you are also legitimately very good at what you do. Then it's pretty easy because you are just demanding you are paid commensurate with impact.

Simply doing overtime and having hustle doesn't cut it though, you actually need to be able to leverage it into career progress or it's just wasted life.