I can release a clipless pedal a HELL of a lot faster than clips&straps.
Back when I was using clips&straps I had some nasty twisting falls that locked my foot into the pedal.
These would have automatically released with clipless.
I watched a guy do one of these a year ago on a dirt mtn road.
He went down in a corner with his leg twisted up and was screaming for his buddies to detach the bike from him.