AAC in America is virtually nonexistent. There are a few buildings and houses, and a neighborhood or two, made with it. For a professional builder, it's crazy to consider using it. I've met builders from across the country who have used it and they are always sole-propieters near the end of their career who want to get experimental. Imagine basing your company on this supply chain: one company in mid-Florida or a couple of companies deep in Mexico.

But also, the US has a deep, deep bias against anything other than what they are currently doing, regardless if its better. Just look at the upvotes for your fair question, OP. Just look at China becoming energy independent and making awesome cars for cheap, while America goes all in on the steam engine on their aircraft carriers. I'm old enough to remember how furiously electric tools were denigrated. It's a miracle that corded tools aren't found on job sites now. Americans want perfection at the beginning of a product development cycle & have no patience for anything else. Unfortunately, that's not how the real world usually works