FWIW, as a tentative technical contribution to the discussion, my Prentice suffered what I now realise was a rollback and shutdown on rollout after an excellent wheelie landing. Exhaustive investigation by the owner established that the flight crew's fuel management had erred to the extent that when the tail went down the gallon or two remaining fuel sloshed to the back of the tank in use, while the pickup was near the front. If the mods feel that this sorry tale does not help this serious discussion, I won't be offended.