I use the term “oxbow” for timelines like this - akin to a wide divergence in a river getting cut off, forming an isolated lake. Time travelers could still get there via a couple specific means, but yeah, it’s not going to be canon history any time soon.
So Trello is fantastic for project management, and has a really solid stable of integrations with third-party services. But it’s also built around a specific Kanban-type paradigm. You have cards, they have these specific fields, you track progress across columns with optional subtasks and all that.
Notion is built around pages, which can have properties (e.g. text, URL, picklist/select). Pages can be nested. Pages contain blocks (e.g. text, a todo list, an image) that hold content, and you can paste Markdown into text blocks. Most importantly, pages can have “databases”, which are just collections of sub-pages, which you can render in a variety of ways.
For example, I’ve got a Villain Roster page. It’s got a database where each page is a villain, and they have properties like “Drive”, “Relationships”, etc. I’ve got a view of those villains as a gallery, like this:
And then an individual page might look like:
If I have a bunch of these pages, I can sort, rearrange, or group them in multiple views, or reference them in other databases via a Relation or Rollup property. You can use this to replicate Kanban boards (and Notion comes with templates, including Kanban), wikis, art galleries, or all kinds of other views on data.
And of course, if I just want to dump a bunch of Markdown into some pages, it does that just fine.