For what it’s worth, the topic has never been whether “you guys” is “masculine” but whether it can refer to groups of mixed or not-all-male gender. I do find it odd you have consistently avoided ever making a statement about the gender makeup of groups to which the phrase can refer. I believe it is possible for the phrase to be masculine in a sense and for it to still refer to mixed- or arbitrary-gender groups.
Can you confirm without ambiguity whether you are indeed talking about the same topic as me?
I only mentioned my gender due to the larger context of the discussion. The implication is there are women who, like me, view "guys/you guys" as masculine and (unlike me) would make a big deal out of it. This seems pertinent to the piece being discussed and wasn't intended to suggest anything about women generally, much less women you personally know in meat space.