Y'all realize 'Y'all" is a sign of ignorance and is considered a hillbillyism.
It's the closest American English has to a plural for "you", unless you care to use the archaic "ye" which most people aren't even going to be able to "hear" or understand even if they could "hear" it.
As for its being a hillbillyism, I've used it all my life, even though I've lived in California since I was 5, and no one minds. They don't even raise an eyebrow when I use it.
And I use it because it reduces the opportunities for misunderstandings.
Now, I anticipate that someone like you, being so fond of looking down your nose at others, will lead off with a personal slander concerning my "ignernce". But don't bother, I scored 800 on the SAT English portion, and I'm an editor and English teacher.
"Oooo, lookee, a Sneerfest I can jump in on!!!"