There's a point where fixing an old door stops making sense, and we'll tell you when we hit it instead of running up a bill to get there. If your opener and door both date to that 1990-2004 build window and the opener's circuit board has already cooked once from the heat, replacing the board on a door that's also due for new springs and rollers usually costs close to what a new door-and-opener package runs. At that point we'd rather sell you the new setup than patch the old one twice.
We also won't try to source obsolete parts for doors that are genuinely discontinued - some of the older steel doors still out there in the 1980s-and-90s pockets use panel profiles that just aren't made anymore, and chasing a matching panel can take longer than it's worth. In that case, full replacement is the honest answer, not a stall.
What we won't do is tell every caller they need a new door. With 44,678 households spread across this area, most jobs we run are a spring, a sensor, or a cable - ordinary wear, not a reason to replace anything.