I'm in my 40s and earn a helluva lot less than i did in my early 30s. I can't be bothered to get up at 6 in the morning to commute for over 2 hours each way for a meeting to earn a bit more. At the time it made sense - now, I'd rather have the time even if it means not having a flash car and tailored shirts. Plus I really can't be bothered with taking endless certification exams. Too stressy and time consuming - I'd rather be a midrank safe pair of hands frankly, even if I could out-flash most of the flash whizzkids. Being the guy who fixes the error at 4am and gets praise is still the guy working at 4am. I've enough savings to retrain as a sparky and get out of the IT gig if cloud kills the fun.
I'd hate to be young now - too much debt to be paid off and no mortgages available thanks to my generation's excesses (cheers Tony and Gordon)