kid-A: ...rendered the significance of 1914 COMPLETELY IRRELEVANT to the JW mythos.
Not so. They still need 1914 in order to "establish" their selection by Jesus 3.5 years later, because 1,260 days/42 months/3.5 times DOES NOT equal 1,260 years.
Revelation—Its Grand Climax At Hand! (1988) p. 164 par. 12 Reviving the Two Witnesses 12 The John class had to preach this message for a definitely stated time: 1,260 days, or 42 months, the same length of time that the holy city was to be trampled underfoot. This period seems to be literal, since it is expressed in two different ways, first in months and then in days. Additionally, at the beginning of the Lord’s day, there was a marked period of three and a half years when the hard experiences of God’s people matched the events prophesied here—starting from the outbreak of the first world war in the latter part of 1914 and continuing to the early part of 1918. (Revelation 1:10) They preached a “sackcloth” message concerning Jehovah’s judgment of Christendom and the world.