The chan* boards are still some of the few places on the internet for people to actually learn something. I went to university, but I feel I only got an education when I started reading and 4chan.org/lit was where I went to learn. This was in my mid-20s - this is where I learned about things like Middlemarch, The Book of Disquiet, If On A Winters Night a Traveler, etc. This (https://4chanlit.fandom.com/wiki/Recommended_Reading/sub) is amazing and can be found nowhere else.
It's also an anonymous board with people who are quite clearly angry and in pain. Since it's anonymous it prevents backlash for hateful ideologies, but it also means that these people can't be found to be reached and helped. But clearly, the solution can't be to allow hate to be public just to help the haters. It's a sad catch-22.