The stated "reason" makes no sense:

> While these mechanisms were often used to bypass Microsoft account setup, they also inadvertently skip critical setup screens, potentially causing users to exit OOBE with a device that is not fully configured for use.

If they're only worried that their users may end up with an incomplete Windows install, surely the solution is to provide a better way to set up Windows with a local account? It's not like people are digging around in CMD and RegEdit during the install for the fun of it, they could immediately stop everyone from using these workarounds by adding back the "set up with a local account" button