ExB: It’s absolutely unfathomable that the Borg have lasted this long.
They survived 1925, which is when Rutherford got a prediction (that Biblical characters would be resurrected and become princes on Earth) utterly and completely wrong. This was the end of a string of predicted dates (1914, 1915, 1918, 1920, 1925) and it seems like the followers had heard enough. They may have lost as much as 3/4s of the membership.
When you think about religions like Mormonism and Scientology, you have very recent creations with some very wild ideas and beliefs along with unreasonably strict control of people's lives. And not only did they survive, they are thriving. Human minds are far too easy to manipulate this way, alas. There are a lot of religious groups that really have no business existing, yet they continue to grow and prosper.