Revised question- Since duct tape cannot be legally used for fixing duct (in many places), and the quality (in general) of tape for making repairs is not as good as alternative methods, duct tape seems to have been relegated to emergency use only.
Duct tape has the benefit of being useful for temporarily fixing almost anything, but are there any uses where duct tape is the most suitable material for long term repair? Can anyone offer an example of where duct tape is the best choice or the permanent solution for a home improvement (the rationale may be required)?