From the first volume of Studies in the Scriptures,
the "Time of the End" began in 1799, when Napoleon Bonaparte imprisoned the Pope.
The Bible Students in 1919 still believed this, over 115 years later. Eventually with the "this generation" becoming tied in with 1874, and the "invisible presence of Christ", it was ridiculous to hold to the teaching.
It was changed, to 1874, and thousands left in the early twenties.
If they could succeed in changing a core teaching 115 years after it became ridiculous, I can confidently say that the WTBTS will prolly try to hang onto the 1914 date long enough (115 years?) for the old die hards to helpfully die, before it is quietly dumped overboard.
This will ensure that these old timers leave Crooklyn something in their wills. So the WT gets their money, and finds a way to hang onto those baptized at 10 yrs of age, to whom 1914 must seem like a million years ago.