Our Latin Mass community is well under the age of 60.
My parish of 850 families, as 8 children as the average. Family buses are the mode of choice. Crunch the numbers.
Right now, as we speak, we have Latin in our liturgy. Many of us are asking for the TLM.
Even my seven year old has been singing Latin since she was four. She sings Latin and English versions of many songs. She is better at translating than I am.
We study Latin and Greek using “English from the Roots Up”. So, some Catholics may not understand it, but the young more than the boomers will get it.
I think it would be good if we had some kind of a rite of passage like the Jews do where the kids have to show an ability to read and speak Hebrew before they can be full members of the church.