"Steve Barker" wrote in message
news
ease of use, don't have to fuptz around grounding them, cheaper, uh, uh
, uh. I don't see a down side myself.

Here in Canada, plastic boxes still have a grounding strap that you have to
attach the ground wire to. No savings in time nor trouble. I find that the
screws for switches and receptacles strip out of the plastic quite easily if
the screw is removed for work a couple of times.