I tried to price them out. They definitely save on labor but they are not particularly cheap. Depending on area your codes may not permit them and/or your local

I tried to price them out. They definitely save on labor but they are not particularly cheap. Depending on area your codes may not permit them and/or your local PEs may not want to sign off on them, even though they're fine. (This usually comes about by the local codes only assuming a finite set of valid structures, and some structure you wish to build not neatly fitting into those classifications.) They could nebulously reduce "waste" but with how much more you're paying for them, it seems economically unviable to use them. In the sense that money is a signal, the waste is still there, you're just not seeing it and being put at an economic disadvantage for paying more.