I, too, have been on a quest to find one app that can do what I need, as is apparent when I started this thread.
I learned about Obsidian here, on this forum, though it was suggested as a note-taking app. When I checked it out, I began to realize that it is a full-fledged writing app, and powerfully extensible with community plugins.
I began to wonder if I could use it not just for note-taking, but for writing my novel. Could I finally do everything in just one app? The more I explored this idea, the more convinced I became that I had found, if not the perfect app (which probably doesn’t exist), an app that would let me do everything I need as a novelist in a way that doesn’t create friction and frustration by having to use two or more apps.
The thing about Obsidian is that I can use it the way I want. I don’t have to conform to any particular app developer’s idea of how things should work. I’ve been able to do sophisticated tracking of absolutely everything that I track in Aeon Timeline, but in a way that is much more flexible and intuitive.
Probably the most valuable discovery is that I can just create a character, or object, or place, or whatever, as I write and then instantly create a story bible page without even taking my eyes off the writing. It is, essentially, frictionless. My creativity does not get interrupted by having to navigate other apps.
In fairness, Obsidian doesn’t have the kind of timeline functionality that is the hallmark of Aeon Timeline, and at first that was a concern. But it turns out I don’t need that as I can use a plugin that lets me create custom tables, including tables with start and end dates for each scene. For writing fiction, I can then just select the table I want and sort it by dates to see my chronology. Or I can create a table of characters by scene – showing me which characters are in a given scene. The possibilities are endless.
The fact that it uses markdown doesn’t bother me. First, it’s simple to learn (took me five minutes). Second, the files are saved as text files using markdown. That means that no matter what happens to the app down the line, I’ll be able to access the files either in a text editor or another app that reads markdown. It’s future-proof. Third, there is a community plugin that gives you a toolbar for text formatting, in case you don’t want to deal with markdown.
That said, I continue to stay connected with Aeon Timeline because of how well it worked for me. I keep expecting to hit some roadblock in Obsidian that would give me a reason to return to the Aeon Timeline/Scrivener combo. So far, though, after several weeks, I haven’t. Time will tell, I guess.