Insufferable answer: Emacs does this to some degree by overlaying "minor-modes" of function on top of one another, even when visiting the same file. e.g. You h

Insufferable answer: Emacs does this to some degree by overlaying "minor-modes" of function on top of one another, even when visiting the same file. e.g. You have a TSV file which you might want to align visually and edit multiple fields simultaneously, so you enable `tsv-mode', and then you enable `multiple-cursors` and you have the desired editing functionality on that file. But to answer your first question: I genuinely envision my ideal future desktop as being some smart-glasses kind of thing, where I can type by thinking. Right now, what my mind wants and what my hands want are often aligned, but my mind wanders. If I can type at the speed that I think, I have the impression that this will greatly increase my overall focus and mind-discipline. (I can also envision employers forcing their workers to install intrusive mind-type monitoring apps, to ensure that they're actually working and not just drooling into space, but that's perhaps a separate discussion.)