Absolutely not, that would never happen. Why? Because there’s a load of stuff that runs on Windows that is ancient and only exists as legacy software and never receives updates.

If anything, Windows is the last operating system that will have locked bootloaders, because if they do, there’s gonna be some bank somewhere in the world suing them because their ancient counting software was originally made for Windows 3.0 back in the day and Microsoft has had to build their entire operating system around making sure that software continues to run.