If you look at the software designed specifically for script/screenwriting, it almost always produces scripts that look like that, even the very latest modern s

If you look at the software designed specifically for script/screenwriting, it almost always produces scripts that look like that, even the very latest modern software. Examples are celtx and Final Draft. Why? Maybe convention, maybe superstition, maybe readability. Coders also like monospace fonts in their IDEs. In fact, the font I'm using to write this comment (on HN) uses a monospace font haha!