[driggs]

For Python source code, where indentation is significant, I'm convinced that long lines should never be broken early. It should be the IDE's job to (optionally) fold long lines dynamically to the width of a viewer's editor.

If someone breaks a statement early at 72, or 79, or 99 characters (PEP8 recommendations), indentation no longer represents the structure of the program, it now represents the style of the author. Everyone who uses a wider screen suffers.

But if the IDE knows how to fold long lines dynamically, then any reader can use any width screen for viewing and editing. And users may choose not to enable folding at all, so that indentation exclusively represents program structure.