Actually, I'm wondering why not more houses are build out of a metal-insulation sandwich contruction, one downside, no nails on the outside walls (but this can also be solved with a regular installation zone out of plywood, here is an example from one who built his own home out of a metal sandwich contruction: https://www.youtube.com/watch?v=brcGQZWbeLI according to him it was really cheap (don't know how it compares to wood framing with insulation)

wondering how prefacb metal sandwich construction compares to prefab wood framing (which is quite common here in germany)