I’m very much in *favor* of line length limits in code. Personally, I still use 80. This isn’t some “stuck” thing—holding on to obsolete tech–the 80 character width was in fact chosen, way back, for readability reasons. (I’ll have to find citations but I remember this) I might be convinced to use 100 or 120, but there must at least be a limit.
The rationale is code readability, especially in the context of safety. If you cannot see all the code for the context you’re auditing, it is not safe.