Earlier quoted context omitted.
> I also think using they/them is only recently considered grammatically acceptable. In general, as a singular gender neutral third person pronoun for a person of unknown, unclear, or unspecified gender, they/them is approximately as old as modern english itself, having been clearly used by one of the earliest practitioners of the language, Shakespeare. What's modern is the idea that it's somehow incorrect to have a…
For what it's worth, I'm glad they/them is catching on and I use it all the time. Growing up, though, I was taught to use "he or she" / "she or he" in English class and they/them was always used in the context of third person plural. I don't consider it a newfangled thing, but the embrace of it feels new.
I do know that realistically something like that would never catch on, but I can dream...