Anyone on Propane?

Propane & LPG was all the rage in the late 70's & 80's, I drove a few service vehicles that were dual fuel & they were gutless wonders. I don't know if any of the companies doing the conversions have delved any further into it. But if the Feds & the environmentalists have anything to do with it, our gasoline powered vehicles will be like the dinosaurs & become extinct.