The Road to 160m+ for Nintendo Switch (EDIT: See mod note in first post for new rule).

[Tober]

It's already there....

The key here is GameShare.

This means you can play Switch2 games on a Switch1 using GameShare, therefore the Switch2 is not only Backwards Compatible, but the Switch1 is Forward Compatible as well!

So 1 Switch family. The numbers should be added, so there you go.