As someone who used nano in the late 90s, it makes me nervous. I recall that you had to be careful to always use "nano -w" otherwise it would silently corrupt long lines, breaking configuration files which use one entry per line (like crontabs). Since then, I have always removed nano from every system I touch, to prevent accidents.
Nano is the first thing I install on a system. It is the closest thing you can get to Pico from the Pine email client from back then, and it's great because it's simple and gets the job done. No muss, no fuss.