How does sharing Steam games with family work now?

saves and achievements stay separate per person, so borrowing a game doesn't touch the owner's progress. the cooldown hits the family too, not just the person leaving. remove someone and that slot can't be filled again for a while (a year, last i checked). so think before inviting someone you're not sure about.

It's Steam Families now. Up to 6 people in one family, and everyone can see and play the whole shared library. The catch is one copy = one person at a time, so if two of you want the same game at once, someone needs to own a second copy. Some games aren't shareable (mostly ones with their own accounts or subscriptions). Also, if someone leaves a family there's a cooldown before they can join another one, so don't add people casually.