If we’re putting the SteamDeck against Nintendo, I’d say the natural comparison is Steam exclusives against Nintendo exclusives.

I disagree. It would be more accurate to say:

If we’re putting the Steam Deck against the Switch 2, the natural comparison is between Switch 1/2 compatible games, without jailbreak, versus any game that works on the Steam Deck hardware be it Linux Native, with wine/Proton and any emulator that runs games minimum original frame rate with minimal issues.

Bear in mind that the Steam Deck is a handheld Linux computer, and anything that will run on the level of hardware it has and plays nicely with Linux will run on the Steam Deck.

Even just with only installing Steam on the Deck, as of mid-May there is 18k Deck Verified games.