The Cape Cods and mid-century ranches that define this city were built with narrow-strip solid oak, nailed down over a plank subfloor. That construction is the best case for refinishing: thick enough to sand several times, and stable because it has already lived through eighty Kansas summers.
What we find most often is a floor that was carpeted in the 1970s or 80s and forgotten. Carpet is rough on the finish but protective of the wood — so the boards underneath are frequently sound, with tack strip damage confined to the perimeter where trim covers it.
The one thing to check before assuming: how many times it has already been sanded. Some of these floors are on their fourth or fifth refinish, and at that point the nails start coming close to the surface. We measure at a floor vent or a threshold before committing to a full sand.