it's quite disturbing to see that even in H12 cloth solver is developed independently from the whole DOP environment in terms of mutual collisions
ever since it went from volume based collisions to surface based it no longer gives feedback to RBDs, Bullet or Wire so we always get one way collision

and the not very cheap trick with creating all RBDs as cloth is not applicable in all cases (fracturing, thousands of RBDs) and it's quite difficult to make cloth fully rigid anyway

are there any plans to implement this feature ?
I think it's quite essential in integrated dynamics environment
even Product Overview still says: “Built so that different solvers can talk to each other, you can simulate using any combination of Rigid Body, Fluid, Cloth and Wire solvers to create boundary-busting effects”

+1 on this.
I asked questions about this in the beta-forum but all i got as a response was the trick you mentioned turning every object in the sim into a cloth object.
Pretty disappointing, would have loved to play around with cloth and rbd combinations.
Maybe in H12.1? ;-)