Essentially yes. It only has traction on X, but in the AI world that is all that is necessary. (its engagement metrics are poor for its size on all other platforms)
I just recently switched away from Bluesky to reluctantly checking back in to X, for the first time since the acquisition. It feels like all the AI information is on X, it's basically necessary.
Bluesky is better than Mastodon for AI, and I'd rather be on a platform where it's more open and I can at least use whatever client I want. I love what Hailey & Cameron are doing on Bluesky and I miss chatting to Penny & Void. But Bluesky felt like being in a rural country town, and X was like a major city. Turns out it isn't just hearing relevant information that's important, but the speed with which you hear it. Half the time Bluesky was just screenshots of X anyway.
I gave up on Bluesky at the point where Anthropic / Claude got its designation from DoW, and no-one on Bluesky even cared. I'm still bitter about that.
what do you even do on X, you basically just subscribe to a bunch of blowhards to get insider sloppy seconds, then occasionally yell into the void and hope someone (anyone) finally responds?
What I found is that the "For You" algorithm on X was better than I thought. Yes, it starts off as terrible, and remains terrible without very careful steering. I'm treating X as read-only and not interacting.
But after liking a few posts by Amanda Askell, Simon Willison, Ethan Mollick, Boris Cherny and others, I was immediately getting far better AI information than I was on Bluesky, from accounts beyond the ones where I'd liked their posts. That isn't necessarily a high bar, but at least it was people actively using AI, people who are positive about the things that can be made with it. I'm more likely to hear about new model releases that I won't hear about elsewhere.
At least on X, I'm going to hear people talking about Claude Mythos, and I'll hear about the Nicholas Carlini talk [1] where Claude Mythos is finding & reporting CVEs in the Linux kernel.
On Bluesky, my time was being spent fighting off anti-AI university professors who were still in the "stochastic parrot" phase. They were genuinely convinced AI models couldn't even write code that compiles, let alone entire working programs that solve problems.
I'm not trying to persuade you or anyone else to use X, and I'd really rather not be using X myself.