The difference is that there’s a lot of commercial support when it comes to supporting Linux servers due to many reasons, when it comes to the desktop it simply isn’t there.
If you require “professional” software such as MS Office, Adobe Apps, Autodesk, NI Circuit Design and whatnot Linux isn’t a viable options. The alternatives wont cut it if you require serious collaboration… virtualization, emulation (wine) may work but won’t be nice. Going for Linux kinda adds the same pains of going macOS but 10x. Once you open the virtualization door your productivity suffers greatly, your CPU/RAM requirements are higher and suddenly you’ve to deal with issues in two operating systems instead of just one. And… let’s face it, nothing with GPU acceleration will ever run decently unless big companies start fixing things - GPU passthroughs and getting video back into the main system are a pain and add delays.
To make things worse the Linux desktop development ecosystem is essentially non existent. The success of Windows and macOS is the fact that they provide solid and stable APIs and development tools that “make it easy” to develop for those platforms and Linux is very bad at that. The major pieces of Linux are constantly and ever changing requiring large and frequent re-works of apps. There aren’t distribution “sponsored” IDEs (like Visual Studio or Xcode), userland API documentation, frameworks etc.