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”?
I’m not a part of the demographic who would experience racism around this. So, I can’t comment there.
I am a white hipster though. So, I usually call my window manager customizations “artisanally hand crafted”.