@0x4d6165 there is a case to be made for writing a first draft in ed (seriously!) I accidentally figured this out while using ed in part of a project of mine as an experiment.

Ed's insert mode is actually pretty ideal for getting into a flow state. You commit things one line at a time. The line can be as long as you want. (I think) you can use emacs/vi key bindings with rlwrap to edit the line. But once you hit enter, the line is in, and you're onto the next thought.