RE: T2 Retry with Delivery Receipt

I haven't seen any discussion on the list from this question.  Does this mean everyone agrees there are valid use cases supporting end-to-end retries?  The way the spec is written now, single-hop, end-to-end retries work.  Multi-hop end-to-end retries do not work when RM is turned on (idempotence).  Can we now discuss what that will entail?  Regards,  David Fischer Drummond Group.