Most of the housing stock across this service area was built between 1971 and 1995, with 1978 as the median build year - and five of the named areas we cover still carry a lot of 1960s and 70s-era stock specifically. That spread matters more than people think when a door won't open.
Houses from that build window mostly came with extension-spring setups or early torsion systems sized for lighter doors than what people hang on them now - insulated steel instead of the old single-layer panel. Swap in a heavier door without upsizing the spring and you get a door that slams down fast and wears out the opener's gears trying to lift it. That's a common call for us: not a broken spring on day one, but a spring that was always undersized for what got installed on top of it later.
We also see a lot of original hardware from that era still in place - tracks bent from decades of minor bumps, rollers nobody's replaced since the house was built. None of this is dramatic, it's just the ordinary wear of a door built for a house, not for the one in front of it now. We're not going to tell you every door from 1978 needs replacing; most just need the right parts for the age of the house, not the age of the door.