Twitter shutting down would need a couple black Swan events, you shouldn’t avoid doing something just because there could be a small chance of death(not walking out side to avoid a meteor strike).
Twitter by all means is superior in every sense, speed, network size, reach and content.
- Multiple C-suite executives and board members get caught up in a Jeffrey Epstein level underage sex and sex trafficking ordeal. They resist when busted, and it becomes a spectacle. The evidence is just messy enough and the group is just tight-lipped enough that the legal parts of the case take a long time. In the mean time, Twitter loses users who voice their objection via not giving Twitter its attention and moves on to an up-and-coming competitor.
- The US elects a group of politicians who have authoritarian leanings (note that these could be extremists from either side of the politic spectrum, imho). This group of people lose power in legitimate elections. Via various levels of chicanery that revolve around undermining the spirit if not the law around the US election system, this group makes it so that they are able remain in power. Once they’ve started down that slippery slope, they just rewrite the laws so that they stay in power permanently. This group clamps down on free speech. The powers that be at Twitter object. A puppet leader loyal to the leading party is installed in order to manage Twitter out of existence, with a state-controlled competitor being supported in its place.
- The US is successfully overtaken in war by another country. The powers that be at Twitter allow for speech against the occupiers. Twitter is shut down.
- Twitter is found to have facilitated genocide in a foreign country (e.g., Myanmar), and the public revolts. To be honest, this will probably be overlooked, but I thought I would put it here as a thought exercise.
Part of the problem with hypothetical black swan events is that they seem entirely impossible… until they happen. That’s why they are black swan events.
I feel like the cheeky cop out answer is that since one definition of a black swan event is that no one could see it coming, it's impossible to give examples because then someone saw it coming :p
Twitter by all means is superior in every sense, speed, network size, reach and content.