[Fnoord]

GNU Nano is GPLv3 which Apple boycots (its v3 since 2007 according to Wikipedia). Tells us GPLv3 works :-) not sure what the license of Pico is. My first text editor was Q&A on MSDOS, it relied on F-keys, and on Windows 9x I got used to ctrl as modifier. Pico/Pine and later Nano was a natural successor, easy to learn. I use Vim and ST now.

[assttoasstmgr]

> not sure what the license of Pico is

Apache 2.0. I've used pine as a mail reader for well over two decades at this point, mostly on big old UNIX boxes. GNU nano always felt like the knockoff version.

[Fnoord]

Right,it got relicensed. Originally it was not available on e.g. Debian.

[sigzero]

I don't even think Pico is in active development any more.