overall i think each decade has had good and bad moments, i dont necessarily think collectively any decade has been better or worse than any other, just different types of good (and bad) and different experiences.
having a family has been a blessing for sure so perhaps that's one of the reasons why the results are such.
one thing i do think about, more often than i'd like, is when i get to a certain age where health has declined significantly, teeth have all fallen out, cartilage in all joints have worn out or thinned to the point where it hurts to walk, taste buds have recessed, risk of a heart attack or stroke increases, aside from having grandkids, quality of life has gone down the drain, i wonder if it's still worth it, somewhat morbis, and probably wont know until you get there.
i think the point is to enjoy the ride to eternity, every decade is a blessing so take the good with the bad