[2mol]

It's generally agreed that it is totally safe (it solves the crossloading issue). I think we can all stick with the proven safe knots that we are comfortable with, and the fact it makes partner check a bit trickier applies also to the double bowline on a bight. I'm equally happy to triple-check myself and make it clear to my belayers that they are off the hook there.

Here is my pitch for "doppelter bulin" (double bowline on a bight):

Even if by some miracle the ENTIRE retraced half of that knot came undone, you would STILL be tied in with a normal bowline. I do a stopper knot too, but I think that illustrates just how bomber it is. And I only use it for single pitches for lead falls, on multipitches I still simply do a figure 8, because why get fancy?