Or random application availability and/or ease of use.

Two cases in point:

• Photo Mechanic. It makes it really easy/fast to sort through tons of photos. There are some Linux compatible alternatives, but they’re just not as good
• Fusion 360. There are a couple of things you can do to make it work, but since Linux isn’t officially supported the install process can be a bit fiddily and there’s no guarantee that an update won’t break things.

Things are certainly better now than they have been in the past, but if you’re somewhat time limited (eg your computer is more of a tool than a thing to spend time tweaking) Linux can still be a bit offputting - especially if some of the core applications you use aren’t officially supported.