[rudra]

vi and vim and emacs... these are good for those who have put lots of hours to make the shortcuts muscle memory. that let's you type, replace, correct text in a blazing fast speed.
but for us look and find and peck at the kb guys, nano is much much more helpful.

vim preinstalled cause vi predates nano and was there. vim just got the place as the successor to vi.

people write about vi/vim cause either they are really used to it or try to raise their coolness quotient. but that is silly. the most important is usability here.