Since the AT rear rim has the “safety” ridges, but the front clearly does not, it may be that the best course here is a hybrid setup of a tube in the front and tubeless in the back. Experience shows the rear is far more likely to get a puncture from a nail or other sharp object. Tubeless rear allows a roadside plug repair in the back. The rear also tends to wear out about twice as fast as the front, so it being tubeless makes the tire swaps less of a pain. The main mechanism of flats in the front seem to be pinch flats after airing down. But in my experience, the front doesn’t benefit as much as the rear from lower pressure, so to avoid those pinch flats don’t air down, or not too much.
I still plan on going tubeless front and rear. Just thinking out loud here in possible compromises...
2017 Africa Twin ABS