Because no one had time during the covid lockdown years to make new memes. Everyone was making bread, decluttering and buying new PJ's.
And now the economy is too expensive to pay for new memes.
I use Discogs to find music I've never heard of, and artists/bands that I have forgotten about. I choose an artist I love, and then just click on the genre link in their profile to see others in that same genre. You can also click on the links of other bands they were in. There is also a Recommendations carousel that appears at the bottom of the page.