One of the reasons I do it is because Google is a bad partner. They will cancel your accounts and delete the contents for no reason, offer no way to get it back and they just don’t care. They will happily do that to companies that pay them thousands a month, they really just don’t care. Even if you don’t buy into the company being evil and privacy invading its also just unreliable to use as any moment they could blow all your data away without reason.