See also: Knuth. Literally wrote the book on algorithms, but barely is able to do more than open a window in FVWM.

This couldn't be further from the truth. He has given several talks where he's projecting his computer, you can see him comfortably switching between all the programs he uses (Emacs, Mathematica, etc); in fact he is very efficient and has them customized just the way he wants it. (I even recall some blog post where the author watched one of these talks and was amazed by just wizardly he was navigating between programs or Emacs buffers or whatever.)

If you scroll down to the bottom of https://cs.stanford.edu/~knuth/programs.html you can see his configurations for Emacs and fvwm and even macOS keyboard layouts; some of them were updated as recently as this year.

This 2020 profile has a photo of him standing at his desk: https://www.quantamagazine.org/computer-scientist-donald-knu... and in the 2008 interview with Binstock (https://mmix.cs.hm.edu/other/knuth-interview.pdf = https://web.archive.org/web/20250408034153/http://www.inform...) he mentioned the set of tools he uses, which includes even “in rare cases, on a Mac with Adobe Photoshop or Illustrator”. Overall he is very comfortable with his computer.

> I designed my own bitmap font for use with Emacs, because I hate the way the ASCII apostrophe and the left open quote […] I prefer rxvt to xterm for terminal input. Since last December, I’ve been using a file backup system called backupfs, which meets my need beautifully […] Incidentally, with Linux I much prefer the keyboard focus that I can get with classic FVWM to the GNOME and KDE environments that other people seem to like better. To each their own.

Can you cite this in some way? Given he's shown the competence to write and typeset an impressive series of books, I find this claim pretty hard to believe.