For whom and what purpose is it the best? There are many niche systems that fit specific purposes. Sure GA can benefit from scale and existing profiles with us

For whom and what purpose is it the best? There are many niche systems that fit specific purposes. Sure GA can benefit from scale and existing profiles with user data gatherer in other context, which a self-hosted solution would not have acces to. But does it address every need better than specific systems? And is the added benefit worth sacrificing your users' data to google?