P.S. I should also point out that the priest I grew up with used a 1945 Missale.
Later in life, when I wanted to pursue a vocation to the priesthood, I read about and started attending the SSPX (the nearest chapel was 75 minutes away).
I'm here to tell you that I have observed *no difference* whether in grace, good works, piety, good fruits, fidelity, stability, etc. from the parishioners attending the Mass where a 1945 Missale was used, compared to all the SSPX chapels I attended where the 1962 Missale was used.
From my personal experience, I can only conclude that the choice of Missale doesn't matter, as long as it cuts out Vatican II (1962 or earlier).
And another thing, which I never drew attention to before, was that both the priest (Fr. Frank Slupski) and the educated layman Thomas A. Nelson both had nothing bad to say about the 1962 Missale -- (at least until the late 1990's, when over 3/4 of the parishioners started going to the local Indult, the Institute of Christ the King). They criticized the Communists, Freemasons, Modernists, and Vatican II left and right. What did they ever say about the SSPX? That they are solid, hard core, and serious, but they "think they're the Church". I can't really have a problem with that assessment. As an organization, the SSPX has always had that fault or Achilles' heel, even when they were good.
But even after the chapel had emptied out, Bp. Slupski had no problem with me going to the SSPX seminary where I'd be trained to say the 1962 Mass. In fact, he sent me there! He gave me my options to pursue a vocation, and didn't care which way I went: Bp. Sanborn's seminary, the SSPX seminary in Winona, MN, and the monastery in Cullman, AL.
If Bp Slupski, who was completely allergic to all things Conciliar or Novus Ordo, and who always preached his mind, didn't have a dogmatic issue with me attending the SSPX seminary where they only use the 1962 Missale, that says a lot.
You know how truth is one and error is many? Have you ever talked to a liberal or leftist about Abortion? Notice how you corner them on one argument, and then their argument changes? That is always very telling.