Earlier quoted context omitted.
Hired at L3 2008 - L4 2009 - L5 2010 - L6 2014 - L7
How much more work do you do at every level? Do you feel like there's an optimal level to reach for your time investment / pay ratio?
But there is definitely more "stress" as you go up levels. You have more responsibility, the problems get harder and more ambiguous, more people issues to deal with, etc. Part of me misses the "L3/L4 me", when all I really had to do was come in, work on relatively scoped technical problems, and not worry about a lot else. But I think I'd also probably feel bored after a while if I somehow managed to went back to that.