Sometimes I've felt like it's cultural appropriation when I tell people that if you do brisket well enough, it doesn't need bbq sauce. Not something I was familiar with until I moved to the hill country, but nevertheless something I found I agreed with. I've found that Texans don't get offended about my "appropriation" at all.
There's a lot of good BBQ in Louisiana, but I can't think of anywhere I ever had it or anyone who ever smoked it who didn't use sauce, because that's what they do. It never really crossed my mind not to use sauce until some Austin-ers told me I didn't have to. Also, imo, Louisiana brisket tends to be a bit greasier somehow, and I like the drier (but not dry) Texas style better.