Jim Port
Electrical Contractor
Toaster and microwave.
Countertop oven and warming plate.
iron and a hot plate. I could continue.
Those receptacle things have [2] spots for plugs. Women do funny things in the kitchen.
15 amp receptacles are rated for 15 amps continuous draw only. I use 20 amp receptacles as often as possible because they have better internals and grip a plug tightly.
None of those appliances listed have a 20 amp cord end. The overcurrent device would trip at the same point if overloaded if 20 amp T-slot devices were used as it would with 15 amp slotted devices.