nostr is the hackers microblog. Just sign things and relay them:
I'm working on a nostr-based discussion site heavily inspired by HN/reddit: https://oddbean.com/
No login required, and you can switch to a different client any time you want. We try to keep the bitcoin/politics stuff to a minimum on the homepage. There's a lot of that on nostr, but also a lot of kind and thoughtful discussion about diverse subjects.
The problem with nostr is that 95% of the conversations are about crypto.