The article doesn’t go into it, but a key advantage they have is that heat pumps move heat, rather then trying to generate it. So they can move a lot more heat into your house than would be generated by running the electricity they use through a resistor. This makes them effectively more than 100% efficient (the exact amount depends on temperature) as compared with burning a fuel or resistive heat.
You could add end-of-life solar panels and an automatic transfer switch and save a lot more.
If only! I have a condo in an HOA neighborhood, so no outdoor goodies.
Get on the board and make everyone do it.