I have been challenged by several people to comment on the use of the word “guys” as a general form of address. The main complaint goes something like this: “What if we're not all guys, guys?”
And I get it: the use of a gendered generalization when a non-gendered one would be more appropriate rubs against some hard-won principles. But “guys” is such a trite word that it seems like an unworthy target.
After all, the title sequence of The Electric Company on PBS opened with a woman yelling, “Hey you guuuuys!” And that was over 40 years ago.