There's a Catholic church in my area that completely turned its fate around when it began exclusively offering Latin mass.

https://forum.musicasacra.com/forum/discussion/9237/amazing-story-of-st.-annes-parish-in-san-diego/p1

There's confession offered not just every day, but at every Mass, and the lines to the confessional are always long.   The pews are usually full for every mass.   Hard to imagine a more vibrant parish.