The Wikipedia definition seems to indicate it has origins as a racist term and I’ve never understood why unix users have adopted this terms instead of something benign like “themes” or “theming” which I remember being in use long before I ever heard “rice”. So what gives? Why use “rice” instead of “theme”?
Wrong.
The word wasn’t coined by the Linux community. It was taken from the automotive community where it was used as a derogatory term to refer to car modifications.
You can’t pretend it doesn’t have shitty origins just because you aren’t familiar with the source.