Across the full service area, 11,420 of 22,301 households own their house, and incomes run a median of $72,606 - Smyrna itself runs close behind at a median household income of $70,473 across roughly 4,873 households. That's a town with enough owner-occupied housing that garage door upkeep is a real, recurring line item, not an afterthought.
The area sits in a cold, severe winter climate band, which is hard on any door regardless of age - cold makes steel brittle, hardens lubricant, and is exactly when a weak spring finally lets go. But a 2002-built door in Smyrna is dealing with winter stress on torsion hardware and insulated panels, where a 1960s door nearby might be fighting winter on a bare steel panel and a mismatched replacement opener bolted on sometime in the 90s. Same climate, different failure points, because the houses aren't the same age.