That sounds more like philosophy than an actual common sense reasoning approach to that passage from our Lord Jesus. I don't intend to offend with saying that, I'm just being honest.
When He said that generation shall not pass until all those things happen, He actually meant exactly that, so it's really simple to understand; we don't need a bunch of political analysts to analyze what He said and tell us. Just understand it how it's simply written, that's all.
No worries brother. Just showing what I see & presenting the scriptures that show it to me.
Don't forget I have no expectation of another day after Jesus comes.
The way I see it, when the Sun & Moon go dark that represents the last night.
When Jesus comes. The Light comes. This is the last day. Eternity.
"22 And I saw no temple therein: for the Lord God Almighty and the Lamb are the temple of it. 23 And the city had no need of the sun, neither of the moon, to shine in it: for the glory of God did lighten it, and the Lamb is the light thereof. 24 And the nations of them which are saved shall walk in the light of it: and the kings of the earth do bring their glory and honour into it. 25 And the gates of it shall not be shut at all by day: for there shall be no night there"
So when Jesus comes:
"17 Fear, and the pit, and the snare, are upon thee, O inhabitant of the earth.
18 And it shall come to pass, that he who fleeth from the noise of the fear shall fall into the pit; and he that cometh up out of the midst of the pit shall be taken in the snare: for the windows from on high are open, and the foundations of the earth do shake.
19 The earth is utterly broken down, the earth is clean dissolved, the earth is moved exceedingly.
20 The earth shall reel to and fro like a drunkard, and shall be removed like a cottage; and the transgression thereof shall be heavy upon it; and it shall fall, and not rise again.
21 And it shall come to pass in that day, that the LORD shall punish the host of the high ones that are on high, and the kings of the earth upon the earth.
22 And they shall be gathered together, as prisoners are gathered in the pit, and shall be shut up in the prison, and after many days shall they be visited.
23 Then the moon shall be confounded, and the sun ashamed, when the LORD of hosts shall reign in mount Zion, and in Jerusalem, and before his ancients gloriously." Isaiah 24
Thus the last day begins like all days in darkness, but this day the last day never ends.
But knowing this is the last day, When Jesus comes it is also judgement day.
Like Isaiah said "the earth is clean dissolved".
Like Peter said "10 But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
11 Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness, 12 Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat? 13 Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness." 2 Peter 3
Like Paul said in Hebrews
"25 See that ye refuse not him that speaketh. For if they escaped not who refused him that spake on earth, much more shall not we escape, if we turn away from him that speaketh from heaven: 26 Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven. 27 And this word, Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain. 28 Wherefore we receiving a kingdom which cannot be moved, let us have grace, whereby we may serve God acceptably with reverence and godly fear: 29 For our God is a consuming fire."
Though the generation Jesus is discussing, His generation can never die but their wordly flesh does not remain. Paul explains about those that remain, they will be "transformed". As John said "we will be as He is". Those that remain have to put off "this body of death".
"49 And as we have borne the image of the earthy, we shall also bear the image of the heavenly.
50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption. 51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed, 52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. 53 For this corruptible must put on incorruption, and this mortal must put on immortality. 54 So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory. 55 O death, where is thy sting? O grave, where is thy victory? 56 The sting of death is sin; and the strength of sin is the law. 57 But thanks be to God, which giveth us the victory through our Lord Jesus Christ.:"
So they do pass away in the flesh. From this world to the next. From the old heavens & earth into the new heavens & the new earth as they put on incorruption & shed "this body of death" into eternity, the Last Day.
It also means Christians will be here on this earth to the very end Just as Jesus says in this chapter.