Yes you can; if you don’t need immediate feedback then immediate feedback isn’t a fundamental UI design feature. You can’t dismiss the rebuttal just by stating that it’s “fundamental” as an axiom to someone who thinks it isn’t.
Of course I can dismiss it, pretty easily: I do need that feature, and yes it's fundamental to any UI in computers or real life, and if he doesn't - I don't mind and don't really care since I'm not talking about HIS needs (or yours personally), I'm discussing his dismissal of MINE (and that of kakoune's devs and whoever else values such feedback) and your characterization of that dismissal as some kind of rebuttal
(also statements like these
> Deleting the current word, sentence, or parentheses block does not involve uncertainty
are obviously false, of course it does, there are different types of w/Words (and different separators, and those separators could also be conext-dependent), many nested blocks you might not be immediately aware of borders of, and also with sentences you might not know exactly where a period is, etc., so there is uncertainty in every such case, so again he's just saying there is no need when there is clearly one
And that uncertainty only grows with muliple selections
