[zaarn]

Using short lines on a screen too wide leads to wasted screen space, usually people dislike that, it interrupts the reading flow.

Same for too wide lines.

The ideal length of a line is somewhere between 50 and 70 characters.

Readable != Good Writing

This is not an issue if you don't use codeblocks, the browser is then free to reflow the text as necessary. If you use codeblocks the browser cannot reflow (by default) and you make the entire UX worse.