Last year at the Oxford Patristics conference I gave a paper entitled, “Άριστον μέν ύδωρ: Ancient Breakfasts and the Development of Eucharistic Foods” in which I argued that the common phenomenon of finding eucharistic meals celebrated without wine might be attributed not to ascetic motivation but to the common pattern of breakfast foods in Graeco-Roman antiquity which tended to reject the use of wine at breakfast as socially inappropriate. The most common breakfast food was bread, often accompanied by water.
Paul Bradshaw has written an assessment of the discussion on this point between myself and Andrew McGowan which may be read here; it was due to be delivered at NAPS, an event which was, of course, cancelled. As one might expect it is a balanced assessment. I comment no further but invite readers to read.