I think part of the reason is some of the crabs have smaller diameter wood which I just don't care to work with as much. I found some great crabapples in a park near my house, similar to what you describe NH. Various crabapples all over the place. I documented size, hanging quality, fruit storage quality (hard or rot). I found some real keepers but those didn't seem to make it in my grafting trials. I need to take my pruners in there and prune the trees back a bit more to try and encourage some new growth.