I remember being irritated as a kid from "master" and "slave" switches on ATA hard disks. I found it really weird that the serious hardware company chose such a colorful metaphor (I think I associated it more with certain sexual practices than historical slavery).

Now I'm used to the terms and don't make the connection anymore. They might as well be completely unrelated words written "mahsta" and "slehf" that just happen to sound like other bad words. In these and similar cases, I'd personally rather keep the innocent meaning of the words, and discourage the original meaning. "Slave" is just a device on I2C, why would you call a forced servant that? And why would you call somebody who committed the unthinkable crime of claiming to another human as "master"?

One very unfortunate name I'm surprized nobody has latched on to is MongoDB...