Experiencing the transition has made me value small communities much much more.
[0] https://blogs.cornell.edu/info2040/2015/10/14/the-evaporativ...
The one problem specifically with reddit and other 'frontpage' type communities is that they don't surface where the actual conversation is in the way vbulletin or other forum software does. With the old reddit code, however, you could go to https://old.reddit.com/r/subreddit-name/comments and see a comment view of the entire subreddit. This would bring the current conversation to the top regardless where it is in the standard view. Really improves the experience for smaller subreddits that don't have much traffic otherwise.
Unfortunately they seem to have removed the feature in the new code. You can still use it in old per above however.
Depending on the newsreader, you could essentially get the same thing by having the thread with the most recent comment move to the to of the thread list. Then, expanding the thread would show new comments in bold font to distinguish then from ones you've already read or previously downloaded.
Being able to see new posts is something that's lacking in reddit and HN (though reddit does provide this feature on subs you moderate or have reddit gold).
The continuous fountain of content model at reddit/hn/digg/etc is good for retinal adhesion but not so good for exchange of ideas.
A lot of the challenges today are related to community size. Also, a lot of the problems are either solvable or already solved, but just relate to platforms wanting maximum user growth/monetization so they disregard those early learned lessons. Just take a look at the stuff Randall Farmer has written. These are lessons dating back to easy online communities in the 1980s.
(And lets be honest, the reason size is a problem is because beyond a certain point, you can't do human moderation).
A: Remember when 4chan was good?
B: 4chan was never good.
This is true for just about every community.
I was heartbroken when I've realized that one of the forums was hosted by an ISP that is no more. I've got some content archived, but damn did I feel weird like some part of my life is gone, wiped off the face of the internet.