But putting everything in one folder still doesn't satisfy my itch to see my journal from two views: time-series (which answers "what did I do X days ago?") and

But putting everything in one folder still doesn't satisfy my itch to see my journal from two views: time-series (which answers "what did I do X days ago?") and project collections (which answers questions like "what's next?" and "how did I solve this obscure problem?!").