Yeah, I can see the advantage. Every church service in Latin where less that 5% understand vs the local language where all but 5% understand. Much better.
What is the lesson of Pentecost to you when the apostles spoke to the crowd in their respective languages?
Let us not forget that the Catholic church is the universal Church. The evangelization of the world to Christ is not immune (for lack of a better word) to practical considerations. One of those is to preach the same message to all regardless of linguistics. Latin was and is unifying. As it was in the past and still is today.
Perhaps there is too much emphasis on “partcipatory” worship.
Fifty years of vernacular liturgy and "active participation" by the laity and what do we have to show for it? Two, going on three, generations of people who can't articulate the Faith in any language whatsoever.