Possibly the best explanation that I have seen written:
One prominent and revered modern Orthodox thinker, the ever-memorable Archimandrite Justin Popovich (D.D. honoris causa, St. Vladimirís Seminary) has written that the Church has known its infancy and its maturity and that to adopt the practices of the Church's infancy would be the equivalent of adults subsisting on the diet of infants. not what has not survived the test of time and the never-failing inspiration of the Holy Spirit in the life and consensus of our liturgical Tradition. The resurrection of discarded and outgrown customs (very clearly it is the customs that have survived that we call Tradition, since nothing NOT handed over can be considered to have been "traditted") has been till now the province of those who have no concept of Holy Tradition, the Protestant sects, who have to turn to customs lost in antiquity in order not to be at peace with Tradition
I'm afraid the canonizing of some imagined golden age may indicate the onset of senility. In the Patriarchate of Antioch, for instance, the resurrection of St. Igantius' teaching on the episcopacy, discarded and outgrown it seems by our metropolitans, is EXACTLY what is needed. And the resurrection of the Patriarchate, over the Holy Ruling Synod of over two centuries, was most welcome. So too real patriarchs of Alexandria and Antioch, instead of court bishops of the Phanar.
Why is Deuteronomy called the "Second Law"? Consult 4 Kingdoms/2 Kings 22-3, 2 Chronicles 34.
The essay sidesteps the question of the origin of Vesperal Liturgies, although it seems to admit that the Early Church had them. For all we know, judging from the essay, the limitation of Vesperal Liturgies could be an innovation of Peter the "Great."
And I can't even begin how much I support the resurrection of this:
I know some disagree.
I have authorized a one-time related innovation, but that proposal was not realized due to re-consideration by the pastor involved. This proposal was to experiment with moving the Divine Liturgy of Christmas Day back to the first stroke of midnight
Ah, this brings me back: I was in Cairo for Christmas, and went to the Arab Orthodox Church. The Christians are a minority, the EO a minority within that and (at the time) the Arab Orthodox a minority of the EO. So I felt quite alone (for one thing, the Copts are still old (their own) calendar). I was in Church, and there was a reader doing hours, the priest, and a few others. So very alone. Then the bell struck midnight, and it was like a rush of wind and the Church became packed-standing room only.
Btw, I went to the OCA (in Chicago) for 10 years, and we always went to Compline Vigil Christmas Eve and DL Christmas day.