Like the author I've also seen many such horror stories before, but always thought that wouldn't happen to me. I'm setting up my new email address on my own domain now, and encourage everyone to do the same. I'm still waiting for my appeal, so have not yet exactly checked how many sites I've lost access to because of Google login. Anyways, I will not make the mistake of using Google login or an email with domain not under my control for registering on any site again, even the least important ones.