Comment by comfypotato

I’d never heard it put that way, that presenting in an editor is a strong no-bullshit signal, but how true is this!

I had a professor who would teach from Emacs. She would store each section of the lecture in a register and paste as she went. (Watching her cursor flit around the buffer was actually strong encouragement for me to learn Emacs; it was nice to see how deftly it could be done without interrupting the flow of the lecture.)

She had slides too, but obviously being in Emacs for these portions allowed interactive displays of code execution.