Just signed up at Bluesky <https://bsky.app/> earlier this morning. Did some searches for stuff on Python, Blender, Linux, NZ etc. Already got into reasonably civil discussions with a bunch of people on related topics, and got some likes on my comments. Feels a lot like Twitter from, say, a decade ago. No doubt there are topics with much greater traffic than those I’ve mentioned. Possibly even some loonies and other questionable content, if you look hard enough. This seems to be a Fediverse-type system, connected via open-source protocols/software. I think there are people running their own servers, it’s not all on bluesky.social.