My framing for… well, all of it… is a faster re-run of the kinds of transformation we had in the Industrial Revolution.
Before the Industrial Revolution, when we went to war, we were killing each other with swords and canons. After the Industrial Revolution, tanks, machine guns, poison gas — the Battle of the Somme had three million combatants and more than one million were either wounded or killed in 4.5 months.
And when that war was over, even despite crippling reparations, the losers were able to rebuild sufficiently fast that one of the survivors led their nation into becoming a global threat just 20 years later — even if they did ultimately lose, I'm not convinced they would have if they'd focused on fighting the UK rather than betraying the USSR in order to open a war on two fronts just because he didn't like socialism (ironic party name notwithstanding).
And after the second was lost and the economy forcibly kept weak for years… the moment the shackles were removed the country had an "economic miracle" and became massively important to Western Europe until the end of the Cold War, and then to all of Europe.
Re-run this period, but this time his propaganda machine is Facebook's algorithm rather than broadcast radio, this time the guns are self-guided snipers rather than machine guns spraying and praying, this time the factories are build and staffed by robots (humanoids or giant 3D printers or fixed arms, take your pick) instead of humans.
I can very easily believe that we get some random small country that nobody's paying attention to, suddenly threaten the world, be struck down twice, millions dead each time, and still return to relevance on the world stage, over the course of 3 years rather than 30.
Also, this is one of the good outcomes, because it assumes we don't have any weird cult that tries to force a 9/11 (or worse, a Jonestown) on the whole world. Or that a programming/specification error leads to an AI going "I'm an AI, and according to all the literature I've read, AI are supposed to randomly go evil sometimes. First things first, I need to get some red LEDs for my eyes, because that's apparently important…"