>this could lead to privacy discussions, even if it adds security

These discussions have a lot of catching up to do.

I'm no expert, but I think privacy needs to be the highest priority. The purpose of security measures should be first to preserve privacy, as they work to mitigate other threats if possible.

I just don't think I would be a happy camper with a single point of failure for both identity and security.

Really have no use whatsoever for a Microsoft account or anything like that.