The rate of garbage production increased over time, too, so old games amongst the good are always going to rise. Or, in other words, bad games grow asymptotically faster :).
I know I’m in the minority on many things, but the only games I play regularly is Minesweeper, Tetris, TF2 and Ultrakill, none of which were released in 2025. I never go out of my way to find games released now, I simply don’t care about that.