Perhaps it's a variant of Eternal September
Threads don't have to start with a blank page. There should be a way to surface background context.
Re:The Bitcoin Halving, Explained
by remmargorp64 on Thursday April 30, 2020 @01:48PM
(#23033732)
That's not a bad idea, but you would need to have some mechanism to prevent popular (but now irrelevant) information from previous posts from immediately overwhelming the new context.
I see the constant rehashing as a byproduct of the fact that the same old topics get reposted over and over again as they resurge in relevance.
I see this as a byproduct of crowd consciousness. Not everyone is going to see a post before it dips out of sight, so it's bound to pop back up again eventually (if it becomes relevant again), and then new people will see the second/third/fourth postings.
As such, the same rebuttals have to be posted over and over again, so that the new audience has contextual information.
It's not an easy problem to solve.