[bardak]

I still haven't seen a single 20A domestic appliance though

[mjevans]

I have, though it's semi-prosumer equipment. The largest UPS systems for standard systems, like someone might want for a small home-lab rack, can be found with 20A 120V plugs that work in normal outlets; if they're on a 20A rated circuit like a kitchen refrigerator or bathroom sink outlet (the two most common sorts in rental units).

I suspect some beauty products might also use 20A, or in combination easily reach that.

[bcoates]

Very common in light commercial applications but almost unheard of in residential because nobody installs nema 20a sockets in houses even if the circuit can handle it