IMHO, the Church Of England, and subsequently the Episcopal Church in the US had the greatest Western Rite musical traditions, but they’ve both gone so far left that I doubt that anyone other than homosexuals hears any of it anymore.
But I’ve got an old Episcopal Hymnal and play a passable piano, so….
It's virtue was that it could be sung together. If the form is meant to be sacred, the best form would have to be adapted to the congregation. Nothing has done that better than the hymn form.
The Soviets, I think, recognized the social power of congregational singing--it stirred feelings counter to their hopes--and produced national themes instead.
If the devil's in the works (surely Catholics believe this) music in the United States has expressly developed in a direction whereby it is "unsingable."