Early-1990s garage doors are usually straightforward, but a few things catch people off guard. If the house hasn't had the opener touched since it was built, the drive gear and sprocket are often original - when one fails, it tends to take the opener with it rather than being a quick part swap. Extension springs from that era (as opposed to torsion) were common on single and double doors alike, and they don't fail gracefully - they stretch, fray, and then let go all at once, usually while someone's walking under the door. The other place things go sideways is garages that got finished out as living space or storage sometime after the house was built. That often means someone boxed in the track clearance or ran electrical too close to the rail, and we find out when we start the job, not before. None of this is unusual for a house from this period - it's just worth knowing before you assume a five-minute fix is a five-minute fix.