What a cold place such a parish would be. I am very orthodox when it comes to the Mass. Concurrent (but subserviant) with my orthodoxy, I value my other parishioners. Sometimes they accomplish wonderful things w/ the help of God. They need to hear our appreciation whether they be Scouts, 1st Communicants, people who have faithfully been married and raised a family in our parish for 50 years, etc. When we applaud (the American customary means to express appreciation) together as a faith community, it is another form of praise and worship.
They aren’t something that “breaks out in the liturgy” but are done after the final prayer and prior to the final blessing. When my former Bishop (known nationally for his attention to liturgical abuses) calls up all the newly confirmed to the altar before the final blessing and then asks everyone to express themselves in applause, I will disregard “interpretations” that say this is improper as something other than from the Church. I’ll consider the use of the Pope’s reference to applause somewhere else in the liturgy than right before the final blessing and thus the use of his quote to prove a “abuse” as a Protestant Sola Scriptura tactic by taking teh Pope’s comment out of context.
In all the cases I referenced, these people have done soemthing that contributes to the parish life and such contributions are a witness to others. Furthermore, not all parishes have halls (ours doesn’t) or the capacity to retain the entire congregation after Mass because of parking limitations to accommodate the next Mass.