The Importance of a Good Workflow

The APL compiler that somebody wrote in APL, that some dialect of APL. It was written in such a way that you can print it on... Forget the exact number. The main advantage is you can have the entire context of everything you need to know for the parser in one pane in your editor. And jumping back and forth between things is just moving your eyeballs, right? There's no scrolling,. There's no go-to definition, there's no any of that.