Multiplicity of Masses (or How Many Permutations are Possible in the NO?) - An Update

Back in July of 2019, I wrote a post titled Multiplicity of Masses (or How Many Permutations are Possible in the NO?). I explained that my total would definitely be low, since I was ignoring the various permutations of readings such as alternative selections, or the option to truncate longer lessons, and taking no account of the three-year Lectionary, With those limitations, using only the approved options in the rubrics, I came up with 172,800 possible 'different' Masses celebrated in strict conformity to those rubrics.

However, it never even occurred to me to think about things like the language used or what is spoken or sung, so imagine my surprise when I ran across this footnote in Dr Kwasniewski's article on One Peter Five, Desperate Defenders of Novelty and the Eventual Triumph of Tradition:

A German mathematician friend calculated that, given all the moving pieces in the selection of music, what is spoken or sung, the introductory rites, the readings, the Eucharistic Prayers, the language used, the use or not of lay ministers, etc., the total number of possible configurations of the Novus Ordo would be 5.000 x 500.000.000 = 5 x 103 x 5 x 108 = 25 x 1011 = 2,5 x 1012, or more than two trillion possibilities.

I began that post in 2019 with, 'Once upon a time you could go to any Roman Rite Church in the world and follow the Mass with ease. The Propers varied, of course, but the Ordinary was basically unvarying.' How starkly false that is today, thanks to the so-called 'reform' of the Mass!