This is just so damn pointless. It will cause some "great" controversy, people will be called white supremacists for refusing to stop saying master. Now even if this catches on, then yeah OK I'll start naming my branches as main unless I want to make a political statement, which would just add to confusion when developing. Meanwhile these people will pat each other on the back, yell "yeah! We sure made a difference."…
Let's call a spade a spade and recognize that this was a big company trying to sound "woke" without doing anything.