It would certainly take a major coordinated effort for all of the countries to fall in line in order to shutdown the directory servers, no question.

The likelihood of it ever happening? It's certainly plausible, but I'm still mixed on if realistically feasible. Though, that's exactly the point of my earlier note. The fact that it is even possible, should be alarming. And as you bring up, the West is now increasingly becoming anti-free-speech, often targeting activists. Which I acknowledge the correctness in @sommerfeld saying in most cases those arrested were due to bad OpSec. That's absolutely true.

However, as far as I know, the likes of fiatjaf couldn't one day decide which Nostr relays/nodes he likes/dislikes and effectively shut down any of them by having some centralized directory servers signal to "nostr browser" that they should no longer use those relays/nodes, unlike what the Tor Project can do. 

So, there is an element of centralization that folks should be more aware of with Tor. What they do with this information is up to them. At no point have I said people should stop using Tor, simply by knowing said information.  

 Revolution is certainly plausible as well. 

 Okay, earlier I responded without this context. That's certainly a reasonable and fair criticism. That's the downside of centralization but its also what makes the Tor network somewhat stable. Suppose they were shutdown though, could the Tor Project just roll out an update to the Tor Browser with new hardcoded directory servers?