I agree that there’s a problem.
If we did open threads more often (once a week, say), I think it would fix the issue. Looking at the current page 1 of the Discussion section, posts from July 4 are still visible.
I agree that the Reddit format would probably work, but it seems inefficient to use another site to be able to operate this one.
Isn’t it evidence for a more narrow conclusion? Specifically, that attempting to precisely predict the far future isn’t going to work well? Arrhenius was correct that climate change was going to happen, just wrong about several particulars. Or was he right for so many wrong reasons that it’s not worth noting?