Old English used to not just have a second person plural but a dual - there was a pronoun for just talking to two people. Pronouns are fun, we need some more.
Legally, I was born in the American South. Now, I haven't been down there except to visit family for a few decades, but yer darn-tootin I'm gonna keep using the dumb language I grew up with. Ain't nothin y'all can do to stop me, no matter how many dicks I suck.