Event décor is a planner’s ally. It creates a mood, moves attendees through a space in a predetermined way and gives them something to talk about with people they may not know well. Of course, décor trends come and go. The popular trends tend to overstay their welcome; most planners would probably be happy at this point to never see another Mason jar. The best ones never go away forever, but get reinvented and imagined for each new generation.