When I first encountered the terminology, it was bothersome. Like, just like everyone says, it's arbitrary words that mean what we say they mean. So there is no reason for them specifically remain as "master/slave". But it obviously reflects the culture of people largely involved in the origin the terms. Reflected,not by the recent (previous 500 years) history of Western Culture, but reflected in that it didn't seem odd/bothersome/problematic to begin with. Instead of complaining about everyone who thinks the way things are is wrong or at the least questionable, it seems fitting to understand why people feel that way. This is an industry and world built on change, but a good deal of you seem bent on NOT changing.