Only 80 years ago my grandfather found Latin incredibly useful. As he moved across northern France in 1944, whenever he reached a village he would seek out the priest, who would also speak Latin, and ask him to assist with translation to French. Of course, since Latin's no longer compulsory for Catholic clergy that wouldn't work so well today, but even in the '90s I found that in English lessons the hands that went up when the teacher asked a question about grammar belonged precisely to the people who were also studying Latin.