Daleport996 said:
İ don't really get the argument why people thınk some thıngs are better just because they're made ın a certaın time period.

There is a real selection effect going on. Take the older stuff. Of course it seems better. Why would people bother mentioning or archiving music (or art, etc..) if it's forgettable?
Nostalgia is a separate phenomena IMO but acts to reinforce this selection effect (because, why would we (as individuals, this time) bother remembering music/art/etc that's forgettable? That seems as if it would be positively nonfunctional.)

Whereas contemporary creative work has only had a minimal level of filtering by the time we experience it.

@savageorange: You know what, I have to agree with that. If you ask me to mention 10 bad songs I've listened to in the past year, I won't be able to answer that. Let alone songs made even earlier. But if it were good songs, then it's just a walk in the park. I think this closes the case for me.