Median household income in Mechanicsburg runs $81,696, a step above the broader service area's $76,906, and that shows up less in the doors themselves and more in the choices homeowners make when a door finally needs replacing - insulated steel over bare panel, a quieter belt-drive opener over an older chain unit. The houses themselves, though, are still mostly working with the bones they were built with.
Across the wider area, housing runs from 1938 to 1998 with a median of 1962, so Mechanicsburg's 1960 figure sits right in the middle of that range rather than off to one side. That means the garage doors here aren't an outlier case - they're close to the typical door we see across this whole stretch of towns, which is part of why we know this hardware well.