The EA forum (and LessWrong) are both structured primarily as a newsfeed of posts sorted by date. This caters well to immediate engagement, but is much worse for building up a repository of knowledge which is accessible and relevant over a long time period. LessWrong 2.0 has (to some extent) managed to avoid this problem by having a) curated content, so that people don't have to look at literally everything which is posted, and b) sequences which store great posts in a format that makes them easily accessible a long time afterwards. The EA forum has neither. This makes it rather frustrating to try to use it to build on existing intellectual progress, as I recently found out while reviewing forum posts on career advice. Why don't we have any mechanisms for ensuring good content lasts, and what can be done about this? (Even just a blanket 'curate everything above x karma' strategy would help, while requiring very little moderator effort. EDIT: I actually no longer believe this last part, I think the key thing is collating material from across the internet.)
Agreed that subforums are a good idea, but the way they're done on facebook seems particularly bad for creating common knowledge, because (as you point out) they're so scattered. Also the advantage of people checking facebook more is countered, for me, by the disadvantage of facebook being a massive time sink, so that I don't want to encourage myself or others to go on it when I don't have to. So it would be ideal if the solution could be a modification or improvement to the EA forum - especially given that the code for curation already exists!