..except that carpet python intergrades aren't species-level hybrids, they're intergrades of different subspecies.
For that matter, lesser pastels (and plenty of other BP morph combos) could be called locality intergrades, as I have my suspicions that the founding individuals came from regionally separated locales of BPs.
For some reason, people don't seem to care about BP localities, and certainly there is no preference for western hognose snake localities. The latter is my biggest pet peeve, because the locality-based color variation in "normals" is huge, if the hobby cared about locality purity with western hoggies we could accomplish some seriously awesome projects. For the longest time, corn snake localities have been ignored as well, except for okeetees. I doubt most of the anti-intergrade guys even give a second thought to corn snake morphs that originate east of the Mississippi river vs corn snake morphs that originate west of the 'sippi. The only ones that people seem to care about are carpet pythons, GTPs, and boa constrictors.