Therefore, my question is, do any of you who are retired regret that you saved too much when you were younger? Do you look back and wish you would have spent a bit more to enjoy your youth, or your kids' youth? Do you now realize that you oversaved and you have more than you need, and you should have spent a bit more when you were younger?
No. I can think of very little that would have enhanced my quality of life the past decade that involved spending more money. Neither my wife, nor I, enjoy traveling to any extent, which is often the non-material way to spend money to enhance quality of life.
For me, it's about doing the things I want to do.
LBYM rarely imapcts that, but working a lot does. Now, I don't regret having then and now working a lot, because it's for a reason, and a good reason. Even if I died tomorrow, it was not then retroactively a mistake to have saved. It would still be just as good a reason.
Regret is typically explained as one of two general forms:
1. I wish I could know then, what I know now.
2. I wish I had done what I knew at the time to be right, but emotionally I chose to do what was wrong.
#1 is usually a waste of energy to ponder. No time machines, do the best you can at the time and be proud, not regretful.
#2 is the real regret IMO, and that's because it's a failure of character, not of the reality of physics as #1 is.
-Mach