Apparently, the next version of Windows will be essentially immutable, just as ChromeOS, Android, iOS, MacOS and some versions of Linux are. The idea is that there will be a compatibility layer for software that expects to make changes inside the Windows directory. On one hand, this isn't a terrible idea from a stability standpoint.
On the other hand, the people doing this think OneDrive and Recall should be part of the OS.
Microsoft dropped future support for Windows Deployment Toolkit a couple days ago. It's not the end of the world for me because I can get away with a lot in terms of running automation with an unattend.xml and as much Powershell as I need, but I'm still disappointed because it was a great and useful free tool.
There's a fairly substantial amount of Windows-related functionality I can't access because it's tied to Azure (e.g. Intune), something none of my customers are big enough to want to buy into. Windows does not look like a professional future for me unless something changes drastically about cloud versus on premesis software.