Those are now required in my state. GRRRRRRRRRRRRRRRRRRRRR!!!
Not all the time but many what happens is the slightest surge when another device plugged in there you are going out to box.
Had a few clients telling me about this they were so ticked off.
Shouldn't be forced once again government sticking their nose where it doesn't belong as this isn't a safety issue from the electricians I've asked about it.
This new code made a lot of people from the manufacture to the electricians big $$$$$$$$$$$$$$$$!!!