it was nice to see the halakhic give and take here!
some very valid points were made on both sides of the aisle.
may all of our discussions continue to be lhagdil Torah u’lhaadira.
sof dovor – bittul of only derabonon? is not birchas hamozon d’Oraisa? Or do you mean that since one can be yotzei d’O with ‘brich rochmono marei’ etc. But is hai pita mentioned in al hamichya? Also, I think the 3 brochos are d’O. (tov u’maitiv is d’R). and as such making only one brocho albeit meyeyn 3 would lichoira not be fulfilling the COMPLETE d’O.
looking forward to hear your reply.