Probably because it’s mostly just a QoL update which also restricts people to one family group - which was always the intention but it closes a loophole where person A could share with person B and B could separately share their library with person C unless all three are in the same family group and geo location. Plus there’s now a year penalty to switch family group or refill a slot that has been vacated so you really have to commit to it. In many ways it’s more restrictive than before, albeit better for the intended use case.
I’m a little bit sad because I shared my library with my brother and niece in other countries in Europe and that’s no longer doable. Ah well
For all the invasive problems this feature causes, what the fuck does it actually do? The ability to ask an ai what website you were on last Thursday? Who needs this garbage