I think this concept went out the window about 60 years ago or at least I hope it did. I would not dream of talking to someone in a way that makes them think they are inferior to me. In the same way, although someone at work might be superior to me (in grade), I would probably only adapt my language a little - a little more formal and less swearing!
In my social interaction, though, as far as I'm concerned, everyone is equal to me.
Student or Learner