This seems to me to miss the point.
I genuinely doubt that many people are offended at master/slave terminology. I personally am not offended, yet I would prefer if we did not use such terms.
Why? Because words matter, and I recognize that where we decide to move terms into every day parlance has an impact on how people think. This after all is the basis of some groups trying to “reclaim” a word by trivializing it’s usage.
As a thought experiment imagine if we got into the habit of naming services or concepts after the Holocaust. How do you think that the casual, daily reference to that event in a different context would affect our perceptions of the 20th century genocide? Would it make us treat the Holocaust more casually? Now imagine how you’d feel if German companies started using that term casually. Kind of icky, right?
That being said, I don’t think that anyone who doesn’t want to go to the trouble to replace every instance of these words going forward is a racist, nor should we tolerate such abuse from a crowd that’s nominally supposed to be doing the right thing. We can advocate for well-meaning changes without being jerks, I hope.
Personally I plan on just using new terms going forward, but I won’t go back and rename every single thing I’ve ever written.
Also, master/slave really isn’t racially independent in America. Slavery is an institution that has cropped up in many places at many times; but here in America slavery refers specifically to the form of chattel slavery that occurred here, and therefore does carry more than a hint of racial overtones.