It's another thing some companies expect you to do, but don't allocate time for it, so at the point you finally know enough to not do a bad job, you're suddenly being pulled out of 1-4 and expected to do 5.
Oof, we had a guy retire over that. In his appraisal he was dinged for not doing enough. They counted his training of new hires as 1 "point" (or whatever, the system was weird). They neglected to consider that he was training 5+ new hires in that year. He'd had enough, put in one last year to wrap some stuff up and then he was out and free.
5. The mentor of younger developers.
It's another thing some companies expect you to do, but don't allocate time for it, so at the point you finally know enough to not do a bad job, you're suddenly being pulled out of 1-4 and expected to do 5.