It's not surprising that people who write professionally would learn one tool to the point it gets out of the way and then not want to change. It's not just sticking with the first thing they learned - there's a constant churn of "tools for distraction-free writing" that address some of the complaints that people that still use older word processors have about more up-to-date systems.

Once you know the pattern, every so often you'll see a piece about a writer or journalist and the funky software they use and you can just wait for it... it's going to be Wordstar, XyWrite, one of the XEDIT editors, sometimes Wordperfect for DOS. Rarely Word for DOS. Neal Stephenson uses emacs, but he's an outlier in a lot of ways. I think there was a piece linked here recently by a journalist who uses the macOS TextEdit for note-taking, which dates back to NeXSTEP. (not exactly the same thing, but consider)