Sorry if I brought up this argument again. I received Christina's message late, and I didn't look at its sending date (my bad here), which definitely precedes the end of the discussion on bug-autoconf. Also, I missed Ralf's finall decision stated on that list (as it wasn't reported on automake-patches too). Add my strong dislike for the gender-neutral-singular "their", and you can see why I answered with a message that might seem bitter or polemic. That was not my intention; I hope that's clear now.
Also, I'm fine with Ralf's decision to use the simplest gender-neutral alternative, namely, speaking to and about "you", the user, or "you", the developer. Regards, Stefano