Hm, that comment mainly seems to talk about how CFF is very specialized at citing software, as opposed to the more general CSL.

"It is is specifically for citing software and datasets… Unfortunately, though, because the schema only has enough fields for citing those two…"

However, the link in OP here suggests they've expanded CFF beyond that to be used to cite anything. https://docs.github.com/en/repositories/managing-your-reposi...