>Really depends on your climate.

Nah, all that determines is whether you need a fallback gas system or not. Even in cold climates, heat pumps can take up a significant chunk of the load on warmer winter days and in the shoulder season.

> The curve changes drastically.

Yes, which is why modern systems can choose whether to run the heat pump or the backup heat based on whichever would be more efficient based on current conditions.

>You can barely get parts for heat pumps just a few years old.

That's not a technological issue. In terms of parts and complexity, heat pumps are literally just air conditioners with a reversing valve, so they're not inherently any more expensive or difficult to fix than an A/C

>I live in New England and it’s just not the way to go. Plus good luck finding an A/C tech out here. Most guys just know oil/propane.

That just means that techs need to keep up with the times.

Similarly, if an area has a bunch of coal plant techs and no wind turbine techs, that's not an argument that the next power plant they build should be coal, it's an argument that they should start to train up some wind turbine techs.

Well those guys gonna go out of business becuase heat pumps are selling like crazy in the PNW.

I replaced a 1970s ThermoPride oil furnace I called "ol' smokey" for its habit of occasionally fucking up and spewing smoke right when you needed it most. Oil cost me 600 a year back then, it'd cost 1500 a year now. The heat pump was 10k and costs about 400 a year in electricty. Plus it's a aircon. Costco deal, with 10pct cash back. Have had zero problems getting it serviced. There is fuck-all to service on it.

The only issue is that it's loud. Not as loud as ol' smokey, but very loud for a 2019 appliance.