That is a cool feature, and I do use it though in a different way. I made an alt account that I buy vr games on so that I can share them with friends. That way if a friend is playing one of my vr games through family share, it won’t lock up all the games in my main account.

In the example you’re talking about, say your SO is playing a game shared from your account - it locks up all the games in both accounts! Pretty annoying if you want to play a game, now.

But if it’s a gog game, there’s no issue at all.