In college, I once spent a month using ed exclusively, to force myself to really learn to use it. I wouldn't really want to go back (except for the perverse cha

In college, I once spent a month using ed exclusively, to force myself to really learn to use it. I wouldn't really want to go back (except for the perverse challenge), but it did make me really appreciate the power of ed/sed/awk/perl and ideas like Plan9's sam/samterm.