Sony doesn't have PS Classics on PS4 either though, they also killed ther PSP store (although you can still sideload games from PC/PS3), PS+ and PSNow both dropped PS3/Vita... their retro efforts also seem largely focused on legacy platforms and those are at an end too, the west hasn't gotten a PS Classic release in over 2 years (3 years for Europe). The strikes against Nintendo you laid out here all also appear to apply to Sony so I can't really follow the reasoning? Feels more like a preference in search of a rationalization.
PS4 is 3.5 years older than Switch. And it still has fewer legacy 1st party titles available.
Speaking of "a preference in search of rationalization", it sure sounds a lot like you have a preference and are willing to take any twists and turns to defend it.
I won't even bother commenting on things like "killed PSP store (but you can still sideload the games)". I mean, really? Really really? Maybe try reading the things you write.
It's not like Sony is perfect in game preservation, but so far, outside of BC, they're doing a lot of things right, right now. But what Nintendo has been doing in recent times has been just horrible to watch. It makes me think that Satoru Iwata was their big game preservation defender, and after he was gone, things have just gone crazy there. I really think that if Satoru Iwata was still here, things wouldn't be like this.