I have a twin
We know these things
So:
I have the solution for game sharing on two consoles and only one digital game purchase!
Not sure why everyone says you can’t?
I don’t know if it works on more than 2 switch as only ever done it on two.
You can actually play the game on both switches with one account and one digital game, at the same time… providing the game doesn’t need online to play e.g you couldn’t play online on mario together
You have the main primary account on one switch that has all the games But make sure it’s in aeroplane mode/not on the wifi or internet
Then you put that account also onto the other switch and log in, this one can be online, you can then log into that account and play the games the other switch has bought and only need to buy the game once but it has to be the digital one