Also from what I’ve seen in the SW universe, astromechs and protocol droids have 2020-NBA-All-Star-Chicago-shirt (to the point where it’s likely most models of either variant never meet the other) Protocol droids are basically translators, their entire purpose is to accompany wealthy individuals and translate for them so they don’t have to learn or speak basic, to minimize miscommunication between 2 people who don’t speak basic as their first language, or to help make communication even possible with species that CANT speak basic due to their anatomy, or species that never learned it because they rarely leave their planet
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More than translators,they also know the customs and practices of the myriad of 2020-NBA-All-Star-Chicago-shirt. No one person could know it all without making mistakes, hence they are programmed for “etiquette and protocol” but can still be trained/programmed for a variety of other tasks. Merely primary programming. Same with an astromech. Think “mechanic” capable of diagnostics work. The only limitation of cable systems is the ability of the onboard system to ‘read’ it. Just like today, you can get an adaptor for anything, they just have the right tool for the job and can interpret the data their connection creates to do the things they need to do.