>>717630523
Sonic Forces looks blurry but otherwise plays fine with stable performance, I 100% the game on hard mode at launch, didn't bother with the alternate ending update.

>>717631337
Bloodstained had some real bad memory leak issues which I'm not sure they ever addressed, but every time you interacted with shop or alchemy menus (which could be pretty damn frequently) the leaking would get worse until the software unexpectedly quits.
Locked 30 FPS and sub-native resolution, but otherwise still a decent way to play the game.

There are some truly wretched Switch ports out there though, that recent Hobbit game "Tales of the Shire" for example.
Though some of the worst "ports" are ones like the Kingdom Hearts games; they're cloud streaming games that require a persistent online connection, fuck that.