where does using "kind" as a suffix (otherkind, fictionkind) originate? we've never been exposed to that. linguistically we assume it's adjacent to -kin. Is that true? What differentiation does it convey for you?
signed, a system with very little humanity, trying to keep up with the fractally-evolving set of terminology in use on the internet that seems like it can describe us, for the times we want to attempt to be comprehensible to others
-kind means the exact same thing as -kin, yes! It's far from being a new thing from the internet, though. It's actually the original spelling of the suffix; nearly half a century old by now. I use this historical spelling most of the time for a couple reasons.
One is that I just think it is a better term. People sometimes misunderstand the -kin suffix as meaning something more like "otherhearted" does since "kin", in a non-alterhuman context, means family.
-kind, on the other hand, is very easy to understand as "of [X] kind".
The other reason is that it is a way for me to quickly and effortlessly communicate to others in the community that I am NOT misusing these words, as so many people online love to do. Those KFF people never use the historical spelling.