Emacs text editor
Stopped usingUsed for over 20 years, customised in Lisp
Lex describes Emacs as his long-time editor, which he later left for VS Code and then Cursor.
“I used Emacs for many, many years and I love Lisp, so a lot of the customization is done in Lisp.”Lex Fridman
Source: Transcript for Pieter Levels | Lex Fridman Podcast #440 (podcast, 20 Aug 2024)