Does your church still use Communion rails? When was the last time you heard Gregorian chant at your local church? Or even a Latin Mass?
Do you often encounter electric guitars and loud drums during Sunday Mass? Female altar servers? Communion distributed in the hand rather than the mouth? How about hand-holding during the Our Father?
Most will say due to Vatican II these kind of things are considered normal and permissible during Holy Mass. However, this interesting video briefly explains how no such changes were actually legislated by the Second Vatican Council.
Note: Video is spoken in English with Spanish subtitles.