re: Why isnt AAC(Autoclaved Aerated Concrete) used more in construction?

I heard the same thing about steel framing a few years back. Now, you have a bunch of half-assed steel framed house that nobody wants.

Proper traditional build techniques yield a home that is hurricane wind-resistant, relatively inexpensive, and with foam, very energy efficient.

I don't think concrete will catch on, even with it's positives.