A recent observation by Fr. Thomas Kocik, author of Reforming the Reform? A Liturgical Debate (Ignatius Press, 2003):
[T]aking the rites promulgated by Paul VI [i.e., Novus Ordo, etc.] as the point of departure for arriving at a single, organically reformed version of the ancient Roman rite . . . would be like trying to put Humpty-Dumpty back together again.