I like my wood/propane mix for heating, because it's immune to power outages. At some point I'll get too old to cut/split/haul wood, though, and will have to figure something else out.
I'm not sure why there's a push to eliminate gas cooking in favor of electricity. Perhaps some people are concerned with methane leaks in the natural gas distribution system.
It's that, as well as the fact that having a gas stove means you have a gas hookup in the first place, so you're more likely to also use it for heating. That in turn leads to more emissions than other heating methods produce.
It can make a lot of sense in urban areas. In addition to removing the methane leaks (with their high GWP), it reduces the need to install/maintain expensive natural gas distribution infrastructure, and also improves indoor air quality by eliminating NO2 and CO production within the house. If the power goes out, you just use a propane grill in the backyard, or a small butane stove.
S̶p̶e̶c̶i̶f̶i̶c̶a̶l̶l̶y̶,̶ ̶f̶o̶r̶ ̶t̶h̶o̶s̶e̶ ̶w̶h̶o̶ ̶w̶e̶r̶e̶n̶'̶t̶ ̶a̶w̶a̶r̶e̶,̶ ̶s̶m̶a̶l̶l̶ ̶h̶o̶t̶ ̶t̶u̶b̶s̶ ̶a̶r̶e̶ ̶t̶y̶p̶i̶c̶a̶l̶l̶y̶ ̶h̶e̶a̶t̶e̶d̶ ̶t̶h̶r̶o̶u̶g̶h̶ ̶f̶r̶i̶c̶t̶i̶o̶n̶ ̶a̶n̶d̶ ̶w̶a̶s̶t̶e̶ ̶h̶e̶a̶t̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶c̶i̶r̶c̶u̶l̶a̶t̶i̶o̶n̶ ̶p̶u̶m̶p̶s̶ ̶a̶n̶d̶ ̶d̶o̶n̶'̶t̶ ̶h̶a̶v̶e̶ ̶d̶e̶d̶i̶c̶a̶t̶e̶d̶ ̶w̶a̶t̶e̶r̶ ̶h̶e̶a̶t̶e̶r̶s̶.̶ ̶Y̶o̶u̶ ̶c̶o̶u̶l̶d̶ ̶a̶d̶d̶ ̶a̶ ̶s̶e̶p̶a̶r̶a̶t̶e̶,̶ ̶m̶o̶r̶e̶ ̶e̶f̶f̶i̶c̶i̶e̶n̶t̶,̶ ̶w̶a̶t̶e̶r̶ ̶h̶e̶a̶t̶e̶r̶ ̶a̶n̶d̶ ̶r̶u̶n̶ ̶t̶h̶e̶ ̶p̶u̶m̶p̶s̶ ̶l̶e̶s̶s̶ ̶o̶f̶t̶e̶n̶,̶ ̶b̶u̶t̶ ̶i̶t̶'̶s̶ ̶n̶o̶t̶ ̶a̶s̶ ̶s̶i̶m̶p̶l̶e̶ ̶a̶s̶ ̶r̶e̶p̶l̶a̶c̶i̶n̶g̶ ̶o̶n̶e̶ ̶k̶i̶n̶d̶ ̶o̶f̶ ̶h̶e̶a̶t̶e̶r̶ ̶w̶i̶t̶h̶ ̶a̶n̶o̶t̶h̶e̶r̶.̶
Never mind. Apparently I was misinformed. The circulation pump moves the water through the heater, but isn't the primary heat source.