I hear Roman Catholics often make the charge that they're the one true church that has withstood the test of time. They discredit Protestantism as a relative novelty. Well, the Evangelical faith has been around since the beginning. Witness the Donatists, Novatians, Vigilantius, Berengarius, the Paulicians, the Culdees (who saved Western Civilization, by the way), the Vaudois (aka the Waldensians), the Arnoldists, the Petrobusians, the Henricians, the Albigensians, the Patarines, the Cathari, the bogomils, the Lollards, the Hussites. And don't forget the Church of the East.
The Faith once delivered to the saints has been around since day 1, and is still alive and well, because the Holy Spirit animates the true believers and leads us into all truth.