Another point that people miss is that all the great movie artists are picked apart in classes for decades to come.
The works of Alfred Hitchcock, Ridley Scott, Spielberg, Kubrick - even Vince Gilligan (Breaking Bad) - they are picked apart, sources are searched of what the director/writer thought when making this or that creative decision. They look at every little facet.
That is why what this Youtuber was doing for years picking apart Game of Thrones is nothing special since this is bread and butter in academia (yes - movies do have an academia world as people want to repeat what Kubrick and Hitchcock managed to do.)
No one will want to repeat what D&D did. Their decision making processes are batshit insane and incompetent. What often helps those underperforming creators here and Rian Johnson is frankly the masterful visual department, the excellent actors, casting as well as the huge budgets. So they have all this going for them while doing dumb as rocks story-points. And in the end due to the scenery and acting, it seems as if it's good because they throw more money at it than at anything comparable or have a strong franchise.
But obviously those works never last the test of time. In this case even more details will emerge later where the production crew will spill the beans, will say how insane the process was. Thus series like Lost are utterly forgotten despite a strong start.
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Edit - there are a myriad of cool satisfying endings that are awesome.
Imagine this:
Jon kills Dany and Drogon directs the fire at him only burning his clothes. Meanwhile the Unsullied and Dothraki realize that something is wrong and are storming the castle, finding out what Jon has done. Jon then jumps on the dragon rises above them and says:
"I am Aegon Targaeryan, son of ...... Yes - the queen is dead, because she slaughtered tens of thousands of innocent women and children. I order you to stay down, mourn the queen and then leave Westeros for the lands that your queen has conquered in Essos."
Obviously a few behave unruly and Aegon Targaeryan burns them while the rest bends the knee. Keep in mind that the Unsullied almost killed him for wanting to defend surrendered Lannisters - you telling me that they would just arrest Jon Snow for killing their divine queen?
Then you go back in time when Jon Snow talked with Aemon Targaeryan - the maester who was a good man, but abdicated the throne. From what I understood Aemon was even the grandfather of Jon Snow. If Aemon had taken the throne, then everything would have been fine. Jon is not going to repeat the error of his grandfather, but rather rule justly prefering not risk the takeover of more evil men.
And who cares if Martin would have written 10 years later that Dany got crazy and Bran was crowned king. Everyone would think that this ending was better.