I use it all the time to mangle small amounts of data, like selecting all the newlines in a file with cntrl-d and making them into "," to make it into values fo

I use it all the time to mangle small amounts of data, like selecting all the newlines in a file with cntrl-d and making them into "," to make it into values for an array or something (obv. search+replace could do that, still it's quicker for a small number this way, or feels like it). It was pretty slick in the early TextMate / Sublime days to see people editing html and making a big bunch of tags all write themselves out simultaneously.