In the "1975" debacle and it's longer lived sibling the "Generation that saw 1914" debacle which ran out of steam in 1995, there were two things missing:
1. The internet being freely accessed by everyone below the age of 70.
2. JW's alive who remembered the last big "the end is nigh" debacle of 1925.
This time, with the "overlapping generation" nonsense:
1. There are plenty of jw's alive who remember 1975/1995.
2. The internet exposes their stupidity to anyone aged 12 - 75 who has a smartphone.
The memorial attendance has hovered just below 20,000,000 for four years. I see nothing coming that will make it increase.