My dad owns a Civic and a Lexus, this has never happened in the past 25 years of living in Canada (and temperatures keep rising over the years). It's happening due to the door design of Tesla where the glass does not have a frame around it. I made the purchase knowing these issues could arise - but let's not try to make it seem like these issues happen to all cars.

In my experience the doors on my 2006 civic used to freeze shut all the time in UK winters (not hugely cold either: 0 to low negatives degrees-C). Also happens on my current 2010 Toyota if it gets cold enough. These have traditional door frames but the ice often builds up between the frames and seals I guess.

Bit of brute force was enough to pull them open. Windows need to be defrosted before you can open them too.

Rub talcum powder on the black isolation and your door should not freeze shut anymore.