You didn’t say where you live, if you live in a place where it’s consistently below 20F I think I’d still with natural gas. As heat pumps begin to struggle as it gets that cold and electric is expensive.

I upgraded two years ago from a 1946 American standard oil converted to gas boiler to a newer boiler. I didn’t go electric because it’d cost 3-4x the price to heat my house in the winter.

Heat pumps are supreme in places with a mild winter or no winter. If you do go heat pump where it can get sub 20 for awhile then I’d recommend have an auxiliary heating system installed.