Obsidian is the last app in my quest for a good local note-taking system. Having used pretty much every tool out there, the fact that Obsidian is local, stores files in plain .md files is the killer feature. It does support a lot of plugins, but I pretty much use it vanilla with a few core plugins. Pretty much everything I keep track of goes into Obsidian. I don’t obsess much with the Zettlekasten approach to note-taking with backlinks.