Being impacted by the Morris Worm, and having a (text-based) copy of the Pons-Fleischman paper, both circa 1988, via the uni Unix server, was pretty cool.
But Chelyabinsk was a massively-shared instance, where a random news event in a place that was absolutely not a media centre, was still accessible in very short order with multiple coverages.
Sci-Hub / LibGen give a similar feeling, though in a different sense. Wells's World Brain and Bush's Memex, delivered. Even if the Establishment is being dragged kicking and screaming.