Good GFCI receptacles are almost 10x the cost. Adding them everywhere would add a few thousand extra to building costs. In any case, new houses must use arc fa

Good GFCI receptacles are almost 10x the cost. Adding them everywhere would add a few thousand extra to building costs. In any case, new houses must use arc fault breakers which do the same thing and more for most things. I would add that big motors will trip these every time, so they aren’t usable for every circuit.