I get your point. I messed with eshell for a while, then used vterm. In the end I just hard wired a swaywm key to a scratch terminal wihch toggles an alacritty instance. I can copy and paste in it fine : in short I find it easier to do “terminal shell things” in a “real terminal” but I can see why others prefer to stay inside emacs. Occasioanlly I’ll use a terminal inside emacs via projectile as its quick to open a terminal at your current project location.

The only “performance” issue for me is lsp - but that tends to be at first run on a large framework. And since my “old” laptop (x1c6) is about 1000x faster than the one I started using emacs on in the early 2000s it really isnt an issue.

Less haste, more speed…

That’s a bit of a damp squib to put it mildly.