VS Code vs Obsidian
Visual Studio Code
VS Code is a free and open-source IDE. Although it's primarily used for programming, it's also a great tool for writing due to its Markdown support, and a vast library of extensions for all kinds of workflows.
Obsidian is a Markdown-based note-taking powerhouse with excellent note-linking abilities. You can easily build and navigate whole knowledge bases with Obsidian.
Fan of note-taking apps? 🤔
Maybe Paper is what you're looking for.