After this fiasco, I don't know how the aluminum wiring manufacturers even stayed in business, yet it wasn't really their product that caused the failure. It was the improper installations.
There was a big problem with the alloy of aluminum that was used before ~1973 or 74. There was too much difference on the expansion and contraction of the wire and the screw terminals of the device. There were a lot of termination failures because of this. After the type of alloy was changed and the CO/ALR devices were introduced there were few problems with aluminum branch circuit wiring, but the PR damage had been done and shortly after the small aluminum conductors disappeared from the market.
Don
