The Linux answer is often repeated but unfortunately, some users depend on various Windows software that only runs properly on Windows. E.g. CAD/CAM, Quicken finance, sewing embroidery, etc can't run in a Linux WINE emulator nor QEMU/KVM virtual machine. And avoiding the WINE/KVM incompatibilities by switching to "Linux-native" software such as Gimp often means having less features and/or not having ability to open old files because they use different formats.
Sure, there's the idea that "90% of users just use email and surf the web so they can just get by with a Chromebook" ... true, but there's still a lot of users who can't because they use other productivity software.
For me, there's always some unexpected situation that requires a working Windows computer. Last year, I had to do an unplanned firmware update on a digital audio interface via a USB cable. There was no Linux updater. They had a firmware updater for macOS but it didn't work. Based on the tech support forums, I had to download the firmware updater for Windows platform and that finally worked.
reply to: >What software do you have that doesn't work in a VM?
Example would be software that use hardware USB dongles for DRM. E.g. embroidery software for sewing machines. The passthrough USB emulation to the vm is not invisible enough to fool the software searching for hardware dongles. Another example was Trimble software for LIDAR that depended on DirectX which crashed in a vm.
reply to: >A good-enough compromise is a dual boot with a tiny Windows partition for the rare cases
That is a very techie solution that's not practical for "normies". Dual-boot creates the "2 os file systems" issue instead of having a single unified disk mount. Windows doesn't have a built-in way to read Linux ext4 file system. Linux doesn't have a bulletproof reliable way to read/Write NTFS partition (various tech forums mention data corruption). Unless one goes external with external NAS hardware and store all documents on an SMB mount -- but that also layers on more technical issues and doesn't work for laptops on-the-go being disconnected from the NAS.