In the professional space:
Add Altium, KNX, pspice, LTSpice (luckily works in wine), and for us electronics/electric guys lol.
Linux is a 3rd class citizen in ANSYS simulation tools. Slow updates, old UI, etc… On Linux. Pretty much only used as a simulation node for kicking on sims from windows.
Pretty much all architecture software
Many ERP systems desktop apps
Not to mention a lot of companies use active directory for access control + sharepoint
Web apps suck, but have been very helpful in Linux compatibility in the enterprise space since the devs only have to care about 1 set of production builds.
At my work, software guys and mechatronics PLC focused guys get away with Ubuntu (saleae is great), but for electronics and mechanicals it is not even worth it to dual boot.
All of their changes will be merged to freecad 1.0 apparently outside of a few UI changes that will be add-in options.