The simplest and most likely reason is just because they don’t have to. Playstation is leading Xbox by a lot this generation (so far, things can change) and PlayStation just has no incentive to add value to something they’re already selling record numbers of. Xbox is trying to attract customers, customer playstation has left on the cutting room floor, and backwards compatibility is a way to do that.
Yea I wasn’t surprised that people on reddit were ready to forgive and forget in pretty much every sub after a few days, the people that were fed up had already left.
I’ve had better luck with Tidal’s recommendations. Spotify just kept playing me covers and live music on my weekly and it was driving me crazy.