It's cars and large houses peripherally connected to amenities by car-only infrastructure.
People love this lifestyle and will fight you very energetically if you try to do anything to nudge city layouts towards the previous level of walkability.
Until they run out of breath, anyway.
Anyone into machining, high powered rocketry, or shooting or hunting.
YMMV but I doubt you could have a magazine and pass inspection from the BATFE or your state inspection for fireworks or explosives. And dense living near a gun range is impossible unless you got money to build a long range that can catch any stray rounds, when done in a rural area this is done using natural land and hills or building dirt mounds, which a walkable city would not have.