Relevant?
With the beginning of Advent the entire English-speaking part of the Catholic world should now be using the new Roman Missal.
With liturgical form in mind, you often hear Christians arguing about what Sunday worship should look like, generally falling into “Traditional” or “Contemporary” camps. Even within Catholicism you find people with very definite views as to what the Mass should look like, some a little more “interesting” than others… :-/
(The above puppet video is kinda barmy. All I’ll ask is this: how many young people do you see here?)