This works for things you are actively interested in, but old Reddit was cool in that random things would pop up with posts from experts related to the topic. You could get exposed to all kinds of interesting stuff outside your normal focus. And for your focus it was amazing. Not just the same 30 regular contributors in the small walled gardens we now inhabit/self curate.

I enjoy making music. I've started commenting on peoples youtube/soundcloud. And I've made a small circle of people to talk with, but it's so far removed from what Reddit used to provide before it became a 'content feed'.