Concrete is not very green or cheap. Stone quarries and transportation for modern suburbia would be very ungreen and expensive.
Aerated concrete for walls is a very awesome idea from Europe, but it’s not structural and by the time you build the structure for a typical two storey I’d bet that stick framing would be cheaper.
Euros typically put a much higher ratio of their income into housing and are willing to spend more. Same for Japan, and they build very good houses, but then tear them down after a couple of generations.
Aerated concrete for walls is a very awesome idea from Europe, but it’s not structural and by the time you build the structure for a typical two storey I’d bet that stick framing would be cheaper.
Euros typically put a much higher ratio of their income into housing and are willing to spend more. Same for Japan, and they build very good houses, but then tear them down after a couple of generations.