Its almost always tools and programs used in their professional life. The 365 suite, adobe suite, fusion 360, simulation programs, …

Yes i know their are free or alternative options, but they are never as good or powerful as the full on suites that have existed since the dawn of time.

Ive been running linux ( dual boot with windows ) on my work laptop for 9 months at this point and i love it. But sometimes, i do have to boot windows for one of the professional suite programs.