>But there's no reason this requires separate authentication technology or infrastructure.
Only if you are Microsoft replacing working login system with a new one costs zero.
But as a user you have no reason to change and many reasons not to do it, especially if you experienced already issues from the Skype account migration issue and you seen the news where giants ban your account for shitty reasons , so now I might lose my MS account access if my son somehow gets banned in Minecraft.
But you will say is more beautiful from an engineering POV to have one account to rule them all, my response is that is not as easy, I might already have 2 Skype accounts, 2 Minececraft accounts and 1 MS account that I use(MS might have created some other ones behind my back), it is ugly not beautifull.
What would have been beautiful maybe would have been from those smart devs to keep the old email and password login work and move their login server to Azure ,Windows and .Net if they are allergic to whatever Mojang uses, that is beautifull when dev changes help the users or don't screw with themn, changes that help devs are just for dev ego.
