I'm personally attempting to transition away from Windows altogether, but it's a long-term organic process driven by hardware changeovers and decommissionings (including a recent involuntary one) rather than remove Windows function X by date Y.

I have Windows on a VM that I remote desktop to for things like budgeting and banking that I'd rather not keep on a "throwaway" type device. Two things that keep me on Windows is Excel (I use enough features that LibreOffice doesn't support) and Remote Desktop (it's just better than alternatives I've tried - I use xfreerdp to connect which support multi-monitor). Admittedly, I haven't looked into alternatives to Remote Desktop as the remote access server for a long time. Whilst vnc was always serviceable, it was never quite the "real" desktop experience that Remote Desktop provides.