Given the discussion of tubless blowouts in this thread:
Schwalbe One update (tube and tubeless)
I noticed that Enve now makes tubeless rims with a bead or "beadless. Below is a graphic from their web site showing the design.
I don't understand how using a rim without a bead will help keep a tubeless tire on the rim. I can see advantages in manufacturing. Note the text in the graphic states that this design helps avoid unpredictable air loss.