Earlier quoted context omitted.
But my electric bill is like $30-40/month, Why would I want to shell out $12,000 for something that will become old tech in couple of years like the 1 powerwall.
30-40$ is probably a very small apartment. A house (2 levels) in Quebec during winter can go easily around 500$ because of the constant heating required.
Is it very common to heat a house using electricity in Quebec?
Where I live, nobody would do that - due to cost. More popular solutions are natural gas or water heat pumps.