At least in my area, propane is the goto if you have no city gas hookup. If you want to go oldschool then you have a fuel oil furnace. Keeping enough wood on hand to heat a house over the winter just isn’t practical for most. Even just heating his wood shop just while he is using it my dad can burn through 3 full cords of wood every winter. My grandpa used to heat his trailer house with wood and he often went through 4-5 full cords in the winter.
I 100% agree that wood is cozy but it’s way easier to just keep a tank of propane or fuel oil on hand.
Just an FYI, that graph is entirely unreadable in dark mode. I’m not sure why they chose to make a graph of all things have a transparent background.