Honestly, I find the Hacker News comments in recent years to be most enlightening because so many comments come from people who spent years immersed in rationalist communities.
For years one of my friend groups was deep into LessWrong and SSC. I've read countless blog posts and other content out of those groups.
Yet every time I write about it, I'm dismissed as an uninformed outsider. It's an interesting group of people who like to criticize and dissect other groups, but they don't take kindly to anyone questioning their own circles.