Comment by pmoriarty

"somehow you're expecting me to stay while my knowledge deteriorates unless I keep it up in my own time, all the while giving lowball raises and not satisfying my desire for challenges"

That's not really the expectation... the expectation is that you'll be replaced by someone younger who's already learned all that.

The expectation for more senior people is that they'll go in to management or architecture.. or maybe burn out.. it doesn't really matter to most corporations, as their workers are replaceable.