Earlier quoted context omitted.
> I'm not saying anything about anyone's intent, but replacing "man-year" with "person-year" is a painless, traditional-grammar-friendly way to go gender-neutral. It is not painless: it is dissonant and takes another syllable. One might argue that is worth the pain and stylistic cost of infelicitous phrasing in order to be sex-neutral or welcoming or whatever, and that might indeed be the case. I think that language…
Speaking of dissonant, as a woman it's always a bit difficult to figure out when "man" means "human" and when "man" means "not you, lady". "Men's room" = "not you, lady"; "man-years" = "of course I'm talking about you because I'm certainly not sexist; man means human, of course, except when it explicitly doesn't, like when you didn't have the right to vote because the right to vote was for all men who are created equ…
The forgotten sexism is that we began using 'men' to refer specifically to males, almost like they were the only people that mattered. It happened so long ago that it's been mostly forgotten that there even was another name.
Though, you still see vestiges of it in the language. That's the same wer- as in werewolf.