[paulddraper]

Screen size. On my two 24 inch monitors, I can easily have four side-by-side files with 100 characters and a large font size.

This being HN, naturally someone's going to tell me they do most of their programming on a 7 inch terminal screen.

But 80 chars comes with a cost: over terse code, or a lot of scrolling.

[Arizhel]

Exactly, I do the same: dual 24-inch monitors with 4 windows, and a 100-character line limit.

[kornish]

Very true. Perhaps I'll have to switch to 100 characters for personal projects.