As a Linux user I have kept Windows 7 & 8 partitions in my laptop and workstation disks for years because there used to be time where you needed Windows in the work for some programs to work and some documents to open. Windows 10 upgrade push made me to realize that that time passed a long time ago. Last time I booted to Windows for other reason than playing a game was seven years ago. LibreOffice works well with MS…
Also I use two massive 27-inch screens at work. My co-worker Ubuntu boxes have difficulties driving them properly (probably driver issues, manufacturer's fault). Also text rendering is still subpar on Ubuntu.
Windows 10, IMO, provides many nice aspects in terms of UI experience. Not that I'm gonna start developing on Windows in any foreseeable future