Let us not forget the "solidification" due to the invention of the printing press and the supplanting of all other texts in favor of the mass printed Venetian texts, including the split Triodion/Pentecostarion (at one time a single volume), which in turn effected the later Nikonian reforms in the northern lands. Some of these things were perhaps a matter of the faithful getting used to custom, but certainly others were simply a matter of "these are the texts that are mass printed" and were thus far more widely spread and available and naturally supressed all other texts. As we know from the earlier triodia, the Holy Week formed the "vigil" of the "flowery" period, but in the split printed triodia, the flowery period was "shifted" to the beginning of the Pentecostarion, thus "splitting" the Paschal Vigil, enabling, in the progress of time, the first "move" of the Basil Liturgy to the morning. Yet, even in Russia at the beginning of the 20th century, as we see from Bulgakov, there was great care widespread in Russia that the Basil Liturgy still at that time begin after noon and rules in place to insure that it was not moved to the morning. Of course, we know that in the Holy Sepulcher (Anastasis), the Holy Saturday Liturgy still begins in the late afternoon.