Not in, but with modern GUIs (so X11 xlibs wrapped by some widget lib) I can't compose nor integrate anything. For instance if I want to do some simple math in

Not in, but with modern GUIs (so X11 xlibs wrapped by some widget lib) I can't compose nor integrate anything. For instance if I want to do some simple math in an email I'm composing I need to launch another application, type the same math I've typed in the message body, evaluate it, copypaste the results, copy-pasting is the sole IPC such tools have. On a terminal, I can run a terminal based editor who typically can run code from inside the text buffer. In Emacs I can do much more in both terminal and X11. That's is. My org-mode notes links anything, meaning mails (searches, specific messages, threads), financial transactions (ledger), elisp code, for instance to act on notes themselves like an `* Online retails orders` heading with a "click here to add a new one" or to change the Emacs/EXWM graphic, for instance to present something, org-ql queries on my notes etc. In pure CLI (not TUI) I can at least cat and process programs output, in modern GUIs I can't. A simple showcase: https://youtu.be/B6jfrrwR10k https://youtu.be/B6jfrrwR10k