What Notion genuinely brings
Notion's real gift to a life OS is visible structure with very low ceremony: databases that a non-programmer can shape, templates that stamp a correct weekly page in one click, and relations that connect a week to the areas it touched so that each area accumulates its own history without maintenance. For the notes-and-structure half of the job it is the most approachable of the three builds in this family, and the phone app gives capture a serviceable one-tap door.
The build stays deliberately close to the canonical structure: the same note types (area charter, weekly page, quarterly goals), the same rhythm, the same templates pasted into Notion pages. What changes is the substrate: pages in a workspace rather than files in a folder, database views where the plain build uses folders, and a relation property doing what backlinks do in the Obsidian build.