I was recently asked by someone I very much respect to address "the" question. So I started to write the answer in a post... about five times without any luck. The "Why does a 20-something join a Reform Congregation" question.
Consequently, these days are recalled and observed in every generation: by every family, every province, and every city. And these days of Purim shall never cease among the Jews, and the memory of them shall never perish among their descendants. – Esther 9:28