I've been using the new Steam Families in beta for the past several months, and it's wonderful.

This feature is why I was willing to buy a Steam Deck several months ago, and I've been very happy with it.

Prior to that, I had been purchasing games on Steam as little as possible -- Epic Games Store, GoG, direct -- anything to avoid Steam, just because I was so frustrated with the old Steam Family Sharing setup and its library lock system.

Steam Families is everything that I've wanted it to be. Super pleased with it, and it's a very pro-user move. Highly highly recommended!