If only we could get that to work in North America and Europe. The schism could end not with a bang but a shrug, which is what should happen.
It used to be the case in Italy (both Sicily and Calabria, where my family is from, and Venice) where people would move from Albania and Greece and then simply accept the Pope as their local primate, while remaining in communion with their Orthodox brethren back home. This was the case through the 18th century; Nicolas Boulgaris for example is considered an Orthodox author (at least by Maloney his
History of Orthodox Theology Since 1453, and Boulgaris’
Divine and Sacred Catechism is published by the Ecumenical Patriarchate’s publishing house), but his book is not only devoid of derogatory comments towards Roman Catholics but even quotes Popes and Cardinals and “Schoolmen” (always St. Thomas Aquinas) to show that the Orthodox customs are regarded as acceptable by the Roman Catholic Church.
St. Macarios of Corinth also lived in Venice for a while, in communion with the local Roman Catholic Church there.
Sometimes Greeks studying theology in Italy would even join local Roman Catholic religious orders such as the Dominicans before heading back home to join Athonite or other Orthodox monasteries. St. Maximos the Greek, a fellow reformer alongside St. Nil Sorsky, is a good example (he became a Dominican under the influence of Fra Savonarola).
It was also common for Ukrainian clergy to have studied theology in Rome, usually practicing as Roman Catholics during their duration there. St. Dimitri of Rostov is a good example.
It was also common for Roman Catholics living in Russia to live as Orthodox without ever being conscious of having changed their religion. I can’t think of any specific names, but I do remember reading in Fr. John Saward’s book
Perfect Fools an example of a holy fool living in Russia who is said to have prayed in Latin and having come from Germany. I don’t seem to have written down his name, unfortunately, but Fr. Saward’s book is where you’ll find it.
And, of course, in the Middle East the Zoghby Initiative is practiced a lot more than it is here, so you’ll see intercommunion between Melkites and Antiochian Orthodox a lot more than is supposed to be going on according to the official rules.