[berntb]

There are lots of reasons for lock in. E.g., many can't move to a place with better job market because of their family.

I'd also guess that those who spend lots of time on StackOverflow are overrepresented among those with low job satisfaction.

Edit: If I had more time, I'd spend it on perlmonks, instead. I might be spoiled; StackOverflow probably looks better to other communities.