We recently got a heatpump and... it feels like witchcraft. It chugs away even at 20F blowing hot air into our house.
edit: apparently I was misinformed, but it doesn't seem like something worthy of being downvoted into oblivion.
It'd be amazing if someone put together some kind of dynamic calculator that could take electricity and natural gas prices and examine inside temperatures based on a smart thermostat system and rejig the cutoff temperature based on all of it.
There's a (third-party?) dashboard of the data here: https://agile.octopushome.net/dashboard
Does make it very clear where the afternoon peak is though, and that's a nice dashboard.
In other words, with one part of electrical energy, they manage pull 3 parts of of heat energy from the outside air into the room. Hence, they use just 25% of the electrical energy that a electrical resistance heater would require.