My Parish is teeming with converts - protestants, at least 10 Jews and one Muslim famly of 9 - and I don't thnk that would have happened back in the day when Mass was what is now longed-for my some self-described traditinalists and we were Church contra mundum.
Vatican Two reoriented (pun intended) us to our true Mission - the Church as Missionary intending to bring the Good News/Salvation/Sacraments to all manner of men speaking all manner of tongues
That's ridiculous. Most of the conversion of what is now Christendom was done with the Latin Mass by those who said it.