Palo Alto's homes cluster around a 1963 build year, which puts a good share of the opener stock at or past the point where gears, boards, and safety sensors are original or close to it. That's older than the 1966 median across the wider 331,204-household area we cover, and it means opener failures here skew toward wear-out rather than installation defects or storm damage. The mild temperate climate band takes weather-driven failure mostly off the table - no freeze-thaw cycling on the rail, no monsoon humidity swelling the housing. What's left is straightforward age: gears that have made a few hundred thousand revolutions, capacitors that dry out, sensors whose alignment has drifted a few degrees over decades. It's a predictable kind of failure, which is part of why it's fixable on a scheduled visit rather than an emergency one.