"Our parents generation spent 10-20 years at a job. Our generation spends 2-5 max."

I wonder if in some ways we're getting just as much done in those 5 years vs the 20 earlier generations spent. Perhaps there's a set amount of work at which people tend to move on (or get laid off) and we're just reaching it faster?

Far-fetched, I know, but still crossed my mind.