I've been using hackernews as a great alternative to reddit. When they shut off compact reddit I completely moved to HN.

I've heard there's a terrific service out there that's a real sleeper. USENET, I think it's called.

Seems like things are currently migrating towards smaller, more closed communities. Things like Discord servers, any of the various services that popped up when Twitter went bad, invite-only chats on any of the various chat services, even web forums are still hanging around. Honestly can't say I'm sad about this transition, I tend to think smaller communities are healthier.

For me, both Twitter & Reddit require a not-inconsiderable effort to extract value while ignoring/digesting the annoyances.

Maybe fewer global social platforms and less time spent on them will do a lot of people more good.

I'm guessing Reddit gets less global and ubiquitous, in the same way Twitter is more of a slice of a niche crowd now too. Maybe that's okay.

Tildes.net is similar but not a replacement

I think Tildes is a good secondary alternative to Reddit, It was developed by a Reddit intern and RiD developer.