This is what scares me most about google products. If I lost my gmail account, I would be totally screwed. More surface area across google products just gives me more of a chance to get banned by some false positive somewhere, with no recourse because none of these big companies seem to care about the human. So I try to avoid google products.
There parallels with any of these giant single user account companies.
The big difference here is that Google, for now, doesn't care if you create multiple accounts while Facebook requires one and only one account that is tied to your real life identity.
If I could create a fake FB account and not be banned, this wouldn't be an issue at all.
Although I also have various concerns with Google, I feel like lumping them in here is a bit counterproductive. Facebook is on a whole other level to Google in many of these respects.
There parallels with any of these giant single user account companies.