As Roman Catholics observe the 50th anniversary of the promulgation of the Second Vatican Council’s “Dogmatic Constitution on Divine Revelation,” it seems an appropriate time to consider ways contemporary liturgical music supports the word proclaimed and preached. Contemporary liturgical composers and lyricists have done a great service to the church by cultivating “easy access to Sacred Scripture…for all the Christian faithful” (No. 22). They have sowed the word in the hearts, minds and memories of the faithful by uniting scripturally based texts with memorable melodies.
— From an article by Fr. Robert F. O’Conner, SJ, on the state of Catholic Church music in the US today.
In his article the author makes it clear that he is specifically discussing Church music written since 2000, so basing comments solely on music written in the 70’s will be missing the point. (I think the first couple of iterations of modern music are worth considering, but the author is making the point about the most recent generation of works.)