Christ's Church was out of the mainstream in ancient Rome as well. It began as a mustard seed, remember. And traditionalist Catholics are better informed and more dedicated--and have much larger families--than so-called "mainstream" Catholics. The wind is in our sails--whereas scandal and apostasy has dogged the poorly-led Novus Ordo Church.
When Jesus was asked how we were to tell the false prophets from the true ones, he answered: By their fruits you will know them. Our fruits have been plentiful and multiply yearly--we are growing at about the same rate as the Novus Ordo is diminishing. Even more, the spiritual harvest has been bountiful--strong families, many vocations, homeschooled children raised in innocence, good, solid catechesis for all.
Christ's Church was not only out of the mainstream during its initial expansion in ancient Rome, it also spoke Aramaic and Greek as its language of mission - it was not Latin based. Ironic that 4 of the 5 initial Patriarchates were Greek speaking - appealing to the vernacular.
Did you happen to notice that Sts Cyril and Methodius didn't use Latin charcters as their base for the Cyrillic alphabet, but instead used Greek as the base, reaching out to their target converts (the Slavs) in a liturgy done in their own language, as opposed to a dead one?
Lastly, I'm trying to find great mass conversions done through use of the Latin liturgy, and am coming up short. Would that be when indians in the new world were forced to convert at gun and swordpoint?
And wouldn't you agree that by encouraging the use of Latin, the RCC of past days was encouraging a culture of clericalism where the clergy and hierarchs felt themselves greater than the laity which they allegedly served?