Cold matters more here than in a lot of places. This region sits in a severe cold-winter band, and openers that sat fine all summer start slipping or grinding once temperatures drop - plastic gears inside the unit contract, chain tension changes, and a door that was already a little heavy from age asks more of a motor that's already working harder in the cold.
On a house built around 1938, we're also checking whether the opener was ever matched to the door it's lifting. It's common to find a newer opener bolted onto original hardware never meant to pair with it - springs sized for a lighter panel, a track that's been re-hung more than once. Fixing the opener alone in that case buys you a few months, not a few years.
What we actually do: test the opener under load, check travel and force limits against the door's real weight, inspect the sensors and wiring, and look at the spring and track before we touch the motor. If the door's the real problem, we say so before replacing an opener that was never the issue.