Remember, the ABA does encompass the entire ABA region. So, a White-eyed Vireo, while locally a really rare bird, is not rare at all in the scale of the ABA. They are year round residents in coastal SE US, and they breed over about 1/4 of the entire US, concentrated in the Southeast. Not rare at all by ABA standards.
FWIW, I’ve only ever seen three ABA code 5’s.