The easiest way to get an idea recorded is the best way. You can teach a child to write sheet music but if there's a faster, easier path to recording musical ideas, that path is better. Sheet music is beautiful, no doubt. But the underlying musical ideas are the true beauty, whereas the written form is a reflection. The method that most expedites recording those ideas empowers the composer to capture the most beauty. We endeavor toward that optimal method and thus may discover a more beautiful expression of it. At the very least, we can return to the historical beauty of sheet music upon discovering it's greater than we first realized.
Timelines are often used in novel writing. For example, the timeline workflow in Manuskcript. The concept can serve a similar purpose in writing historical articles but would probably hinder writing math proofs or technical manuals. For an editor, the feature should be accessible but hidden by default.