All true, and also: GFCI breakers will not substitute for the dual breakers used in many panel boxes, they are too big. And, use of GFCI breakers is not compat

All true, and also: GFCI breakers will not substitute for the dual breakers used in many panel boxes, they are too big. And, use of GFCI breakers is not compatible with three-wire circuits used in many locales in the US, at least. (What I mean is, two hot wires of opposite polarity sharing a common grounded conductor, allowing to run two circuits over three wires.)