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.
In short: yes.
In long: I want separate logins for different domains. In no universe should Minecraft share a login service with Azure cloud engineering. And I shouldn't have to log in to use offline applications locally. And teams should support different logins for many accounts, like Slack figured out ages ago. By forcing changes to the login pattern for negligible to negative consumer benefit, it's clear Microsoft continues to be broken.
Microsoft and login services are terrible, and uniting them under one login to rule them all doesn't help.