Comment by RiverCrochet

There's a lot working against fundamental change of PC desktop OSes that corporations use, therefore OSes that Microsoft can make money from.

- Big software vendors (Autodesk, Adobe, etc.) making it difficult for Microsoft to deprecate or evolve APIs and/or design approaches to the OS.

- Cybersecurity/IT security groups strongly discouraging anything new as potentially dangerous (which is not incorrect).

- Non-tech people generally not caring about desktop PCs anymore - phones have that crown now.

- Non-tech people caring much more about interface than the actual underpinnings that make things work.

Outside of the PC there's some innovation happening, at least with the OS itself and not user interfaces. Check out Fuschia sometime.