But don't think I'm boasting here... that I never gave 'growing-up' a try.... fact is.. my life was mostly growing-up followed by severe regression.. growing up again then yet a another step back.. over and over and over. But today I can say....
If there is anything about one's elder year's that is good... might I saw 'terrific'... it's no longer any need or compulsion to grow up.
But to your point:
There are a lot of bands, songs, that at one time seemed heaven on earth to me... but which today I find quite mediocre. Same with movies, novels, just about everything. HOWEVER... that's not the 'rule'.
Most of the time, actually, I am finding that what long ago I thought bad, or at least not very good, today I find great. Or at least worthy of getting to know again. - JamesJM