Hyperbole, eh. Where in Canada did you live?It’s mostly hyperbole. People that live in these regions always use block heaters and even oil pan heaters. It’s not uncommon for parking lots at work and malls to have power outlets for this very reason.
Block heaters yes. Interior car warmers - not usually. You generally can't run an interior car warmer at the same time as a block heater because if the breaker blows you won't even have a block heater. Oil pan heaters - never seen one.