After the 1925 failure, not so far removed from the 1914 failure, MANY people did leave (I seem to remember reading 75%). Then Judge Rutherford went to work literally reinventing the religion, and it recovered.
I believe that kind of reinvention would be much more difficult today because of the internet. In the past the Watchtower Organization depended on people not knowing about it's past, or JWs would conveniently forget if they did know. But the internet doesn't forget, and the growing number of those revealing the real truth about Watchtower, such as Youtube presenters, is amazing. Most are very good at documenting their information.
Who knows ... Watchtower can be very clever in a deceptive way, but it will definitely be an uphill climb this time around, and I tend to think it won't succeed.