When you go to Greenpoint, Brooklyn's Polish neighborhood, there are supermarkets with multiple shelves dedicated to mustard with the slight regional and stylis

When you go to Greenpoint, Brooklyn's Polish neighborhood, there are supermarkets with multiple shelves dedicated to mustard with the slight regional and stylistic variation that you describe. I assume that the narrow selection was based on attempting to recreate Beard's list rather than all of the mustards available to a New Yorker.