One of my former co-workers loves Nano. It does what he needs, it was installed on all our systems, if not it is safe to just apt-get install it. Most of our documentation said this like "edit this line in this file, using: vi <path to file>." Every time he wrote documentation, or updated existing, he'd change "vi" to "nano".
It always makes me smile and think about him when I spot "nano" somewhere in the documentation.