> My favorite bit of Googleism: Go to any site you sign in with Google SSO and watch the URLs in the eight redirects it has to do before it signs you in. You'll see a "youtube.com" in there. Even on a Workspace account. Youtube.com is a load-bearing website in their core auth flows.

I assume that's just because they need to set a cookie on the YouTube domain in case you visit YouTube later on the workspace account, and not "load bearing"in the manner you insinuate

> like a phone number you configured six years ago

I've put in a heroic effort to make sure they never get a phone number, specifically so they can't start handing my account over to the first clown who simswaps me, and have been successful. Unfortunately, this makes my account weird, which as you noted is fatal.