I like a line length rule because I use an editor that can show me multiple files side-by-side, and keeping things to a certain length ensures that I can productively do that.
And my terminal happens to be around 240 characters wide for the font size I use and the size of my laptop's screen, which means if I limit to 80 characters or less I can snugly fit three files, or if I set to 100 I can get two with some breathing room.
Plus, if a line really is going over those lengths, then it's often a code smell: maybe I've got code that's too complex and ending up deeply-nested, or maybe I've got functions or methods taking way too many arguments, and hitting a line-length rule will warn me about that.
And my terminal happens to be around 240 characters wide for the font size I use and the size of my laptop's screen, which means if I limit to 80 characters or less I can snugly fit three files, or if I set to 100 I can get two with some breathing room.
Plus, if a line really is going over those lengths, then it's often a code smell: maybe I've got code that's too complex and ending up deeply-nested, or maybe I've got functions or methods taking way too many arguments, and hitting a line-length rule will warn me about that.