However, now I'm all for it.
What has changed? Over working in tech for a while, I noticed some patterns in my coworkers' behavior. I noticed that the same people who didn't switch over to saying "primary" and "replica" back in 2015-ish, and when it started becoming more common, and in fact, actively ridiculed it (just like I did) were the same people who would casually say things like “Oh those Indians screwed it up” while talking about problems with an overseas helpdesk. They didn't even consider that I, as someone of Indian descent who was apparently "all right" in their view would be offended by this (Note: when the screwup was, say, due to people from our TX helpdesk, they would never say “Oh, those Texans screwed it up”). Oh, and I never heard this kind of stuff from the few women or PoC in our office.
Now I can easily see how at least one black coworker would be offended by these people animatedly discussing how the "slave" is not correctly following the "master", and how it might affect their work day, week, or month in a really bad way.
In general I have seen that people who think more about the language they use and how it might affect others seem to make better, nicer coworkers. That's really the primary reason I support these changes now.