Maybe a Cali thing? Here in TN, most of the JK's, JL's, and Gadi's still wave.
think it is a Cali thing. But in the mountains like Big Bear or Mammoth, I get waves all the time.
I'll guess it's a urban/suburban vs rural thing. Here, in the urban areas, if you get a wave its with one finger and a horn. Get away from the big cities, and people are still friendly and wave to strangers. It's probably the same where yall are.