Right, but if all terminals behaved like modern pieces of software, we would take functionality like Warp's as given, instead of suggesting workarounds.

What you describe sorta works, but you lose things like file/dir-based autocomplete, since your editor doesn't know about your shell session.

or just type "fc" to edit the previous command.

Or v for those using bash's vi mode

Other shortcuts to edit prompt in editor:

Alt-e for fish

Ctrl-g for Claude code