Purposeful, intentional "anachronisms" in secondary worlds don't really bother me as much. I do think you can tell the difference between it being intentionally weird and just laziness though. As with most things, probably the mileage varies based on the reader.
Yeah, I've noticed this when it comes to fantasy works I've read--one thing if they meant to have it that way, and another if it looks like "did they even do research" (which I can be nitpicky about, admittedly)
Yea and even with the intentionality there's always a risk, but for me at least I don't want my secondary worlds to be apples for apples with our own. I'm fine with words or things that have one specific meaning/history here having a different one in someone's fictional world.
