Cannot speak for all but usually its money. Many companies cap technical tracks pretty fast while management is uncapped. Next as as you go further in your ca

Cannot speak for all but usually its money. Many companies cap technical tracks pretty fast while management is uncapped. Next as as you go further in your career then management as a nearly universally considered a valid next step. For me, my manager was fired and rather than having to deal with hiring my boss (for second time), I took the role even though I knew I would dislike the politics/drama.