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.
Storytelling seems to underlie all media. Video production, music composition, writing. Whether for a bland, fact-based documentary or an animated cartoon, all these artistic tasks involve a process of storytelling. We must create the optimal experience for storytelling through software, remembering even this process of building software is one of storytelling. We know the resolution, the creation of a software that best facilitates storytelling. Working toward that goal, we should consider all we do, even these very words, as key to success. If we begin building with the focus on storytelling through written language, we can later add elements to handle specifics such as audio and video meanwhile providing an encompassing base capable of dealing with every conflict.