Speaking to that, the most played song on Spotify, ever, is "Blinding Lights" by The Weeknd. Came out 5 years ago, and it's "okay"; funny enough, it triggers a lot of 80s nostalgia with its instrumentals. So, there's a data point for you to ponder.

What I find really interesting of late is YouTube Music suggesting sleeper hits to me, that were big 20-30 years ago, but somehow missed out on them. "Somewhere Only We Know" has been on rotation in some shopping venues & showed up on my playlist; it was a hit, 20 years ago, yet somehow missed out on it.