I personally believe that lack of clarity is the only reason these kinds of changes should be made.
I assumed that master/slave terminology came from the idea of copying from a master record vinyl, am I missing something?
I just wonder if this will set a precedent of controversy about the most innocuous things, just to make sure it's politically correct.
Specifically, even if the phrase is based on an earlier technology, what is that technology's terminology based on? There is no other answer but actually slavery at the end.
Why it this? Because it is not motivated by code improvement but by political demands. The clarity of meaning will be lost by these changes for future developers, because of the need to censure the word "master" from speech and writing.
And yes, this sets a precedent that all you need to do find more words on the euphemism treadmill that may be labeled offensive to force their replacement. This will result in further loss of clarity in documentation where clarity can be reduced whenever someone demands that "for diversity reasons" words need to be deleted.