SF words, generic and otherwise

The modern world is reworking its use of gendered pronouns and other references. While I am, in most circumstances, what David Foster Wallace's family called a "SNOOT" (in his essay "Tense Present"), intolerant of any Trotskyite deviationism in usage, it's surprising, at least to me, how latitudinarian I am about it: I go for the singular "they" in circumstances where the referent's biological sex is unknown or irrelevant, rather than the once-standard "he", the alternating "she" and "he", or...