As we all know, I'm a prescriptivist, for the most part. But when one of Simon's godparents announced that they were nonbinary and use "they/them" pronouns, I (slowly, because I've known them as "she" for decades at this point) made the switch. As for neologisms, well, people have tried gender neutral pronouns, and the only one that's stuck has been "they/them." I could list a whole bunch of failed ones--and I have known people who used them, honestly--but in this case, there's an English word that's been used for a thousand years as "single person of unknown gender" that can just as easily be adapted for "single person of nonbinary gender." I've come around.
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Gillian
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"