No one aspires to live at “home” forever, but some young adults are short-circuiting life’s natural progression to avoid the inevitable – growing up. The causes range from social anxiety to a hostile economy, complicated by the growing availability of marijuana. Staying frozen in post-adolescence, dubbed “failure to launch,” is only likely to grow with four states (Colorado, Alaska, Oregon, Washington) and Washington, DC, legalizing marijuana’s recreational use. Eleven states