It's resilient due to the wide prior adoption. For example, I rarely see Threads or Mastodon embeds in new articles, it's still mostly Twitter. Changing that will take years.
The numerous competing platforms that want to replace it are all competing for users, which prevents a migration to a single alternative platform.
And that buys time for X to improve, which IMO it is. I may be wrong but I think long term it’s going to come out on top. At this point it’s getting tough to bet against Musk.
Twitter isn't dead yet, but it's no longer the universal town square, and the longer Musk controls it, the further away from that it will get.
Not to sound like a gatekeeper, but it feels Twitter is still appealing for the /r/startups crowd, "indiehackers" influencers and wannabes. The center of "real" tech talk has moved away from twitter.