This is bad. Because,
a. Switch 2 can get bricked when Nintendo wants you to upgrade to the “Switch Tree.”
b. If you discover a purely unused switch 2 decades later it will be useless. It’s bricked unless you get that Switch 2 update.
c. It all ties to that Nintendo bricking terms of service terms.
Yeah I dunno how locked down SteamOS is, but if they let you, then it could probably work