I remember years ago, family sharing was a cool feature but I didn't get involved with it as I didn't like the fact one had to share the same credit card / payment method, across all accounts.
Thus if I added my Wife and Son to my family sharing, they would both be using my card whenever they made purchases.
This was years ago, recently I moved to the 2TB iCloud Drive plan, and I'm now interested in sharing that resource, but only if I can keep our accounts/payment/files self-sovereign.
I searched for authoritative documentation, but can't see any.
If I just shared iCloud Drive, can I keep these aspects separate per user, whilst sharing my space?