- It didn't suit my note-taking instincts: most things that I think are worthy of writing down are either much longer than one sentence (notes from a meeting, say) or much more numerous such that they would drown out the todos and events.
- It was difficult to generate a view of "okay, what needs to be done today?"
- It felt frustratingly analog: things like running monthly migrations and building up a table of contents was one of those moments where I was just like Ugh, can't I have an app do this?
These are largely quibbles with my own personal habits and tendencies, rather than flaws with the system itself. I'm happy with my replacement approach -- Todoist with daily Bullet Journal-esque notes that get migrated at the end of the day -- but it's still lacking with regards to retrospective.
That being said, Bullet Journals were the first step in getting me to seriously consider how I retain information and organize my tasks, so I'm forever grateful of them for that!