Lots of reasons to keep lines sort, though you could argue 80 is pushing it. I've found 100-120 is generally fine for most scenarios on modern hardware.
Just keep in mind that code will be read and shown in a variety of different places. For example reading the code on github or other source control tracking tools, reading it on different terminals with splits active (tmux and VIm splits), etc. Keeping it short just makes it more portable for readability purposes. That's definitely a good thing.
Comments
Lots of reasons to keep lines sort, though you could argue 80 is pushing it. I've found 100-120 is generally fine for most scenarios on modern hardware.
Just keep in mind that code will be read and shown in a variety of different places. For example reading the code on github or other source control tracking tools, reading it on different terminals with splits active (tmux and VIm splits), etc. Keeping it short just makes it more portable for readability purposes. That's definitely a good thing.