Why So Long

In ספר החיים by the Maharal's brother, in the chapter on galus and geulah he starts with the reason's of the lengthy golus.  The first two reasons are bittul Torah and lack of proper teshuvah which is probable a test for every generation.  His third reason rings a little more relevant specific to our times, even though surprisingly he wrote this in Europe hundreds of years ago when Jews were downtrodden and poor.  (Though he did live at the tale end of the paradisus iudaeorum so things might have been better but as we know from the golem stories there was already opposition cropping up.)

                                                              To live a Eretz Yisroel life: