I am familiar with the RCD systems and when NFPA gets done, I think our solution will be better but more expensive. Between the GFCI and AFCI that incorporates GFPE protection, every circuit will be protected.
The main advantage is, when you get a ground fault, the whole house doesn't go black.
That might be an Easter Egg hunt most of us would like to avoid.
In most cases you will be in eyesight of a GFCI you tripped..
