Shoot. So a family plan won’t work on a second switch? Thats a huge downside and pretty much talks me out of it. They have their own profiles with their own saves. If they can’t access the games, there’s no point.
People are talking about different things here.
If you're talking about the Family Plan for Nintendo Switch Online ($35, up to 8 people, NES/SNES/Game Boy/Game Boy Color games)
* You add each USER to the plan, up to 8 people total. You are the primary/managing user.
* Each user can access all the retro games, online gameplay, and save file backup on any switch their account is logged into. You can be signed into two Switches without a problem.
The "primary switch sharing games" thing is different:
* You can designate any Switch as the "primary" Switch for your user account. Accessing the eShop sets that Switch to your primary -- I think.
* ANYONE ELSE signed into a Switch can play ALL GAMES owned by "Primary" accounts on that Switch.
* Thus -- if Bob has Switch #1 as his primary, Nancy can add her account to Switch #1 (not set it as her primary Switch) and then play any of Bob's owned digital games. If Nancy signs into Switch #2 as her primary, Bob can add his account to Switch #2 (not primary) and play all of Nancy's owned games on it. In addition, Bob and Nancy can play any of their personally owned games on ANY Switch they are logged into, as long as they are online as well.