Are sites like lemmy , reddit and discord the true successors to the old internet forums of the 2000s . or were the forums superior to todays reddit , lemmy or discord
I never really got the distinction. Reddit was just a massive forums with a lot of subforums. So yeah, there's the difference that it's centralized, but that was a pro in my book.
Now Lemmy/Kbin etc. seem to do the best of both worlds - centralized and decentralized at the same time.
So IMO yes, these sites are the successors. Not Discord, though, that's a non-indexable chat app.
I think a big difference is the temporary nature of threads on Lemmy/Reddit. On forums, a new reply pushes a thread back to the front of the page, which leads to discussions that can go on for months or years. On Lemmy, a discussion is active for a few days at most, with the exception of stickied threads. It leads to a different discussion culture and I do sometimes miss that aspect of forums.
Another difference is that on forums you tend to get to know the members if you hang around long enough. On reddit/lemmy I never got this feeling, you're just discussing with random usernames and once the discussion is over, you will probably never run into each other again.
You can still get to know people on reddit. I know some by name. But only on smaller communities that still use the old style flairs, because it's easier to notice that the same type of post is generally attached to the same mini image and then the name gets noticeable.
This effect was entirely gone from medium sized communities and up.
When you reply on Lemmy, it may push the thread on top of the «active» filter, so it is similar to forums.
Some forums feature voting but to my knowledge none of them has a display algorithm based on votes.
As a general rule, I think the things that tend to happen on each kind of Internet platform with user-generated content are mainly the result of how that platform is structured: which posts are shown to whom under what conditions, etc. These are just some examples of this phenomenon.