I once thought that they would have dropped 1914 but now I realize that would sink the keystone to their doctrines and remove the aura of being a prophet. They did drop 1975 because it isn't necessary to their doomsday teachings. That's why they were forced to come up with this nonsense about overlapping generations.
I heard they even have dropped their idea that the creative 'days' were 7,000 years old which was the foundation of 1975 chronology. Now, 2 overlapping generations after 1975, most JWs haven't even been there to witness that fiasco. The generation that witnessed the 1975 debacle is getting older. Oops, that includes many of us.