Typically a generation is calculated at 40 years. But remember, God does not calculate time as we do.
God's thoughts are not as our thoughts and ours are not as God's.
I believe every generation since Revelation was made public has experienced parts of the foretelling there. And in this century we have certainly arrived at having the technological capacity to create the eschatological end of the world scenario at will, and as pertains to any religious tradition wherein their holy book describes such a fate. Islam, Christianity, etc...
Imagine the history of world conquest and those who thought to conquer and rule all. Those evils they resorted to in that quest.
How easy would it be to bring the world into submission were each region wherein the majority of faithful believe in end times teachings did witness them occur in the skies overhead.
Governments around the world have that capacity. Holograms beamed into the skies that can penetrate from the upper atmosphere so as to appear to be descending to earth.
But outside of that, we here are living in Hell regardless of the faith tradition that teaches of such places as that. In my faith, Christianity, I am told the adverse, ha Satan, roams this planet like a hungry lion seeking souls to devour.
With over 2000 years of one God's teaching as relates to peace, and love for one another, look where we are as a planet inhabited in majority by those who hold faith in gentle Christ.
Why is the end times so important? It's personal to each one of us as to the level of import we put on those scriptures. For me, I keep a column of the prophecies in one side of my recollection while navigating the contemporary world and watching as certain of them unfold.
But I am not hundreds of years old, so perhaps these things have transpired before the eyes of others long before now.
I think we are to be aware but not afraid. Those who are indwelt know their destiny. And that is why there is nothing to fear.
One thing for certain, if it all pops off in our lifetime it is going to be one heck of a show.
Long past the, "we told ya so", as pertains to those who did not believe as we do. Or mocked us for daring to live committed to the scriptures truth.
God's will be done.
As it always is.