Definitely not a myth. They are notoriously failure prone. Repeated expansion and contraction and just age can cause the contacts to loosen, which increases resistance, which increases heat generated at the point of connection, which increases the amount of expansion and contraction, etc.
A lot of people don’t even realize they have a problem until they plug in something high wattage like a space heater or hair dryer and the outlet gets nice and hot.
Definitely not a myth. They are notoriously failure prone. Repeated expansion and contraction and just age can cause the contacts to loosen, which increases resistance, which increases heat generated at the point of connection, which increases the amount of expansion and contraction, etc.
A lot of people don’t even realize they have a problem until they plug in something high wattage like a space heater or hair dryer and the outlet gets nice and hot.