Look, I’m fine if we want to remove the AOU codes too; I certainly didn’t add them. My point is, we can’t have random shorthands created for everything.
M-dov may come naturally to you, but MODO is literally used all the time, to the point where birders will use that shorthand verbally in the field. With the exception of the common names, the 4-digit AOU codes are likely the next most popular way to refer to these species in the field.
This topic keeps deviating. It was not meant to be a discussion on the history of the IBP/AOU, nor was it meant to be a discussion on which field codes the IBP should have chosen/prioritized.