You kids and your new fangled nano.
Back in my day it was pine and pico. We did SMTP both ways. And we liked it!
Actually, it weirds me out that the default editor on most Linuxes now is a pico clone. Some don’t don’t even come with a vi out of box.
I started with emacs in college because I liked LISP. But once I was a sysadmin, I learned vi fast because it was the common denominator between Solaris, HP-UX, AIX, BSD, Linux, etc. and I was in a group that absorbed teams that used all of them. …OK, to be fair, our stuff was BSD :).
My first instinct on a fresh/new to me host is to vi. And even when I type nano, I can’t stop my hands from doing vi and get peeved. Fine ‘apt install vim’ or whatever.