Ha, I’m a Gen X’er as well, and had a similar experience w/ the Medium editor. I still hit space twice all the time. They’ve done such a stellar job with the text editor on this site; it’s a perfect dovetail of science (coding) and the art editorial style. It’s one of the aspects I love most about Medium — esp. having worked as an editor professionally (and as such someone who takes notice of so many nuances at play — e.g., the consistency of no spaces around em dashes, which is another conscious stylistic choice they’ve made).