I have my doubts regarding taking a decent photo of black tire tread on a black tire. Here is a little more detail, though.
After studying all four for awhile, I have decided these Wranglers don't have treadwear indicators running across the tire like most do, but have two that run around the tire near each edge. The rf tire's outside indicator is completely gone, while the inside indicator is still visible and right at tread depth. The lf outer indicator looks like the inner rf indicator, and the inner one still has some clearance. The rear tires both look good with even wear across and from tire to tire. None of the tires show cupping or feathering, or any of the other wear patterns that show up on web searches.
Most of the 33K has been on freeways and highways. I am a cautious driver who gets at least a 100k between brake jobs and always take the curves slowly. (the dogs appreciate this)