Back in the 1960’s the guitar was a symbol of the popular culture of the time. Folk style music abounded even in the popular music realm. Guitar music was heavily featured in variety shows on TV back in those days and also in nightclubs and bars.
But now, we are living in the 2010’s. And the guitar is not nearly as popular of an instrument as it was back in the 1960’s. The guitar music played at the average Sunday Catholic Mass seems very dated, not timeless. Like it belongs with bell bottom jeans, long sideburns, and leisure suits.
My best analogy is it’s kind of like the old round multipurpose sports stadiums that cropped up in the late 1960’s and early 1970’s. At the time they seemed modern and hip. As the years went by, their drawbacks started to show. And by now, they’ve pretty much all been torn down and replaced by retro looking ballparks and stadiums. But these new stadiums also incorporate modern features that were not available back then.
IMHO, that’s exactly what we need to do with the Mass. Get rid of those dated elements. Not only guitars, but ugly abstract art and felt banners etc. And replace them with timeless ideas that will look contemporary but can withstand the test of time.