Earlier quoted context omitted.
If it makes you feel any better, not everywhere is like that. I work at a mid sized technology consulting company on the east coast, and I've heard multiple managers say that they hate when they have to manage developers from the west coast. My manager told us about a time she got a nasty email from the lead developer of a team because she started an email with "Hey guys" instead of a gender neutral greeting.
That is regional, though. I'm from New York and I've addressed groups of older female relatives as "you guys" without anyone batting an eye. In other parts of the country that's not common and people see "guys" as gendered, and people feel like you're forgetting they're there. The word "dude" as a form of address is gender neutral and business appropriate some places and not others. It's a hard problem: Y'all works s…
If I know that some phrase is really uncommon or has different shades of meaning in a different part of the country or a different part of the world, I also know that if I use that phrase in that other place, it will get interpreted differently from what it means to me. It can be frustrating if I haven't yet picked up on the differences, but it's just the nature of communication.
I have also tried to hang on to "y'all" and "folks" since moving to the west coast. "Folks" is a harder sell though, when I use it feels more like an affectation. But that's my perception of others' perceptions. Maybe I'm pulling off "folks" without realizing it. But "y'all" has more staying power, because it's a legitimately useful term that's otherwise missing from the English language.