I'lld happily ride a SS with only a front brake, unless there was a huge mountain descent, or there was ice on the road.
The trick is, being able to use the front brake without going over the bars. Any good rider will be able to brake (front) and steer at the same time ( and stop more efficiently than if they only had a back)
Front brake FTW, it's not rocket science, just basic physics.
I'd like to see you 1 brake SSpeeders ride the Malvern hills!
Unless your all running discs you'd be eating hedge.
I think I all ready said that about descents.