Thanks for your post. It all depends upon where one lives. The Latin Liturgy Association lists all Masses in Latin in the U.S.--both Traditional and Novus Ordo.
However, there are effectively 3 different "Latin" rites in the Church nowadays--the Novus Ordo as it is at most parishes, the "reform of the reform" Masses, more in line with Sacrosactum Concilium than the Novus Ordo, and the Traditional Latin Mass, which I argue, is closest to being in line with Sacrosactum Concilium as the Council Fathers envisioned it.
Sagacious observation.
One could infer that from the tweaks/changes made by Pius XII and John XXIII--
A good guess would be that the Fathers envisioned exculpting some of the repetitiveness, using vernacular for the 'prayers at the foot...' and using vernacular for the reading/singing of the Epistle/Gospel at the altar, instead of once in Latin, then repeat in English from the pulpit.
Also a bit more vernacular in the 'after-Communion' portion.