It depends where you live, where you get your electricity from, for how much, &c. It's an amazing tech don't get me wrong, and of course youtube tech nerds love these kind of things, no surprise here, I just don't think it's the silver bullet everybody imagine it is.
Anecdotally, two of the smartest people I know love heat pumps—doesn’t Technology Connections too?
Was probably this:
https://youtube.com/watch?v=7J52mDjZzto