[b800h]

This is the same in British English. I found the main/master switch absurd. I went to school, and was taught by masters: an English master, History master and so on. In my cultural context, the switch was just cultural colonialism from America.

[TeMPOraL]

This is the same in other European languages. For example in Polish, the equivalent word, "mistrz", refers to all the things GP said, but doesn't even have a meaning that could be applied to slavery.

As for American English, wake me up when they rename Master's degree.

[b800h]

Well, the tide is going out now. That's unlikely to happen until the virus mutates and reappears in thirty years' time.