Let's say next generation...
The JK driver's, even the soccer mom's, wave around here and in Chattanooga where I work. The JL, JT not so much.
I’ve noticed that here in so cal too. I bought my JK last summer. The TJ would get stares more than waves. lol. One of my new JK buddies put a hand waving decal on their windshield because they were tired of waving.
I was on the other forum as well. It had lots of info and solid content. This was my TJ: