William H. Macy had this quote about movies of the past, specifically he was quoted in a Playboy interview, but the quote can apply to music as well.
A 2 second Google search didn't lead me to find it, so I'll summarize what I remember. But he said he hates when people say older movies were better than current movies, that it's just not true, it only seems like that because we only remember now the good ones of the past and only show the good ones, but that there was a lot of garbage too released in those times that gets forgotten or overlooked, and that most of the older stuff was garbage, and that's the way it always is for any given year/decade.
It goes in line kind of with the previously mentioned nostalgia quote.