> 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