I go in 5-10 houses a week for my job and I'd say maybe 5% of the homes I go in have wood heat, maybe 15% or so have pellet stoves. I would say 90% of the homes with pellet stoves have only electric heat as their main heating which is why they install pellet stoves. Most people don't want to bother with the work associated with wood and over half the homes I go into have oil heat so the oil companies are doing well here in the northeast.I'd be curious to know how many people heat exclusively with wood, vs. just supplementing. Those of us who heat exclusively with wood are in even more of a minority!
I find most people that burn wood are in the smaller rural towns in my area.