Distillation is not enough
I think there's a somewhat popular meme in some rationalist circles that goes something like: "To make intellectual progress, we just need to create a space where people can propose lots of ideas rapidly, not worrying about the quality so much. Then, we can come back and organize all of the good stuff into a distilled form." This leads to things like LessWrong shortform, LessWrong annual review, blog posts like babble and prune, and so on.
I think the two parts of this meme are important, but I think on their own they are not enough, so I feel like extending this to include more things like exercises, spaced repetition, asynchronous support, etc.