GFCI (what I meant - not GCFI) is the plug that comes on literally everything that gets plugged in that is remotely meant to be used around water: hairdryers, pressure washers, Shurhold DA polisher (boats), etc.. It's much quicker and more precise than relying on a circuit breaker if something electrical gets wet...Like say yr hose bursts sitting on the ground unattended and starts squirting all over yr Master Blaster while yr 30 feet away wielding that humongous hose.
And on the other hand, you can buy 5 pretty nice shop vacs for the price of 1 MB. One to vacuum, one to dry, one to hang on the wall and stare at, one as a backup, and one to polish...
Obviously, I have no love for my MB.