For graduating seniors, spring marks the season of advice as predictable as the flip-flops under their caps and gowns. Throughout the May and June rituals of Class Day celebrations and graduation ceremonies, successful members of older generations will urge this year’s crop of Millennials to pursue their dreams and, by extension, travel the same path they did. But most of their young audience already knows better. They know they face an uphill climb on their path to economic independence and the markers of full adulthood.