[Superman]

I'm not an electrician, don't play one on TV and didn't sleep at a Holiday Inn Express last night but I will tell you what I think I know about Al wiring. I used to work with electrical inspectors. Their concern was that over time, the Al connections would loosen. Perhaps Al expands and contracts more than copper. At any rate, over the many years, the connections would become less tight, resulting in resistance, resulting in heat. Aside from that problem, I'm not sure Al is that bad. But.....loosening connections is plenty enough of a problem. I got the impression that if someone went in there every decade or so and retighened the connections, Al would be fine. But who wants to do that?