That's perhaps the saddest part of this ordeal, the Deck struggles to keep framerates consistent in all but the easiest to run games. From what I've seen most games are playable, but there are often stutters and interruptions because of things like shader compilation that seem to make the whole experience quite frustrating.
The other issue is that the manageable framerates only exist when the Deck is throwing everything it's got at the emulator. The advertised battery life of the Deck is shorter to begin with, and the chip constantly running at max power only makes that worse.
I doubt anyone is going to buy a Deck instead of a Switch to run Switch games. Any fan seeing clear footage of game performance should realise that to play Switch games, you should really just get a Switch. By killing the videos, they're giving off the signal that they're afraid of emulators encroaching on their territory, which will only drive Deck sales.
I'd be interested to know how it does with Breath of the Wild as well. Animal Crossing, too. We own both games, but the Switch's long load times hamper my fun. It's especially a problem in Animal Crossing.
Last time I looked, it took an uncommonly powerful computer to emulate BoTW, but I haven't looked in a long time.
Not really can't, moreso won't. It's embarrassing how small their retro games lineup is, so long after launch. And yet they're raking it in, because their extremely low quality online offering is so cheap that it doesn't matter to most.