I fall squarely into the 80-column limit camp, at least for C++, but I admit an important exception: string literals used for user-visible messages, like error

I fall squarely into the 80-column limit camp, at least for C++, but I admit an important exception: string literals used for user-visible messages, like error messages in a compiler. It's important to be able to grep for them reliably and not have to worry about having them be split across source lines.