Messenger supported UF wire?

I just assumed it was OK to run UF as an overhead span because I've seen it so many times around here in New England to feed sheds or accessory buildings.

With a porcelin screw-in anchor on each end of the span, proper drip loops, and enough ground clearance, what danger could UF wire present compared to single conductor or a triplex overhead span installation?

Was UF ever allowed as an open non-mesenger supported overhead span?

shortcircuit