Thirteen named areas, one dominant build era: 1980s and 90s construction makes up most of what's on the ground, bookended by homes as early as 1972 and as late as 2004. That's roughly thirty years of garage door hardware history still in active use across the service area, which covers an estimated 17,965 households and 9,934 owner-occupied houses.
What that means for your door: if your house is on the older end of that range, you're more likely running a one-piece or early sectional door on side-mount torsion hardware, the kind of setup that doesn't get stocked at the big home centers anymore. If you're on the newer end, you've probably got a center-mount torsion spring and a belt or chain opener from the late 90s or early 2000s, which is a different repair conversation entirely - usually a gearkit or a capacitor rather than a full spring swap.
We see both ends of that range regularly because that's what's actually on the street, not because we're guessing at what might be common.