> I'm much more convinced Microsoft wants to do stuff like sell cloud subscriptions at the click of a button in the desktop than Microsoft gives a crap about those subscriptions being tied to a consistent account ID. The latter certainly sounds evil, but not in a way that particularly helps Microsoft over their competitors.

Bless your cotton socks, you had it in the first part MS wants to sell stuff, but then you failed to realise that by tying people to a consistent account ID builds a profiling on them that lets MS serve targeted advertisements, through Edge.