I used a similar setup for a while: Obsidian for taking notes in markdown, and vscode for coding.

Eventually I moved to using vscode for both. My gigantic notes.md file is always open in tab 1, so I can go to it immediately with Ctrl + 1.

Finding notes in a single file is easier for me than finding them in a bazillion tiny files. And there's less friction whenever I need to make a note (no need to create and name a new file).