I know this is a super old thread but just wanted to chime in and say Obsidian has been life-changing for me. I am a disorganised mess, but before Obsidian it was 100x worse. I tried other note-taking apps but the thing I liked about Obsidian is it's really an app that grows with you.
You start off barebones and you build up your plugins, note templates etc until you craft an app that works exactly the way you want it.
Other apps I felt like I had to fight them to get them to do what I wanted. My Obsidian works the way -I- decided I wanted it to work.