Try to think of something advanced but theoretically possible that would rapidly proliferate. No weapons.
My first thought was some kind of farm tech leading to a second agricultural revolution, allowing AES countries to thrive despite sanctions. Some leap forward in permaculture or vertical farms or whatever.
Another idea was a breakthrough in cryptography makings comms be completely anonymous, giving insurgent movements a more even playing field.
Massive inventions that change productive relations are not a path to communism, just an opportunity to sieze the means of production during the crisis that the new productive mode causes.
The reason that technology has mostly stagnated since the 60s is because huge changes in the way business and production is conducted destabilizes the status quo as it learns to cope with the new system.