I think it's quite telling then, that a large amount of links posted on HN are sadly still to xitter

And what discord and slack channels would you recommend?

Twitter is not really substantive, that is true, bit it is quite valuable in learning about something existing in the first place. For example yesterday I learned that "niri" DE exists from a random comment to a tweet, and it is quite an amazing tool!

I don’t understand the purpose of this comment given the context. People with plenty of real purpose and substance do post to Twitter (e.g. Andrej Karpathy).