That is not the only improvement, but it is pretty significant to be able to now use CTRL-Q to quit, CTRL-C to copy, CTRL-X to cut, CTRL-V to paste, CTRL-F to search forward, CTRL-Z to undo, etc. The old key bindings (being very old) were a bit like using Morse code in modern times (I nearly said like Vim or Emacs, but luckily I didn't as that would be sacrilegious). You can still opt though to revert to the old key bindings if you really wish.
I do also like it being open directly to a line number with `nano filename:number`.
See
Nano 8.0 Command-Line Text Editor ReleasedBeloved by countless Linux users, the Nano text editor rolls out v8.0 'Grus grus' with modernized bindings.
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