It's rather hard to compare unless we know the spaces involved. My energy usage was significantly less when I was on the ground floor of a large apartment complex, using maybe 500kWh/mo at the highest. But I had less than half the space I do now, no private yard, no private garage. I couldn't install amateur radio antennas however I wish. I couldn't make changes to the unit however I wish. My family has grown and I now work from home significantly more than before.

I don't need to use as much energy as I do, I could go back to living in a much smaller space and not have all the private spaces and rights I have now. But I'd rather not raise a family in <900sqft when I can afford not to and I get a lot of enjoyment of the private spaces I have.

Sure, we could get everyone to use <500kWh/mo, even if we don't have to ask everyone to move to the narrow space that's close to room temperature year round. But that would mean massive changes in a lot of lifestyles, limiting a lot of people to far less space and property rights than they've been used to.