The challenging thing for developers evaluating all this is that
many of the points above have not been said so explicitly by
Apple. Apple has instead outlined a series of rules, each rule
being worded somewhat differently between the App Privacy
documentation and the App Tracking Transparency documentation. A
generous reading makes it seem like you maybe could comply with
the rules and still use some of these SDKs. Maybe.
Apple did not — and from a legal perspective likely can’t — explicitly ban the Google Analytics, Flurry, Facebook, and
Firebase SDKs. Their wording leaves some wiggle room. It seems
like it could be possible to use them. It seems even more
possible that Facebook and Google could make them usable. However,
this puts developers in the situation of evaluating the changing
documentation, complex privacy policies, and large settings panels
that these tools offer, trying to judge whether a given setup of a
given SDK would now pass muster from Apple’s perspective.