They are in regular use on modern cars and bikes as a cheap alternative to the good old hose (jubilee) clip. They often require special pliers to fit/remove which is one of the negatives for me.
Main objection though is that they are not adjustable. Many times a slight weep has been cured by the fact that hose clips are, especially if a small socket is used in preference to a screwdriver to tighten. I always replace factory ones with stainless BTW.
Persistent leaks from larger bore (radiator) hoses can be cured by using two adjacent to each other with their screws 180° apart, avoiding the sliding parts being in line. Always tighten hoses when warm through when hose is most compliant.
Finally they can also be replaced with hose in-situ by unscrewing, opening up, fitting over hose and re-engaging thread.
