Once burned, twice shy. It’s going to take a few more generations to see how long they actually maintain that compatibility for going forward.
I suspect consoles will move to arm chips at some point. When they do, will Sony and Nintendo bother making a Rosetta type layer for backwards compatibility to play the games they’re selling now? I doubt it. We’ll see.
Xbox series plays all xbox one and even a bunch of xbox 360 games
Ps5 plays all* ps4 games
Every console has moved to essentially off the shelf soc so backwards compatiblity comes as a side effect