I've recently switched to using VSCode with these[0] two[1] extensions for all my markdown notes (I completely live off extensive note-taking and have gone through every single possible Markdown editor), and I couldn't be happier.

For the few devices where I don't have it installed, I use Mark Text[2] which is free, open source, cross platform, and lets me edit the same notes (stored locally, and synced to my NAS and OneDrive).

I truly don't understand why so many people are using centralised cloud sync notes, giving up file system access to your files and any reliability that you'll still have access to your notes in the future. People who are serious enough about note taking to require a markdown editor in the first place should be the same people who'd like to make sure their notes will still be available a few years from now. Not to mention the handiness of having your local filesystem when handling notes, eg being able to create a shortcut file in a project directory to link to relevant notes in your notes folder, and do that from multiple different project folders. Or being able to reorganise in bulk, rename in bulk, search/replace, all that stuff OSes have been working on for decades that <Insert Note App Startup> has listed in the TODO section of their readme.

[0] https://github.com/yzhang-gh/vscode-markdown [1] https://github.com/mushanshitiancai/vscode-paste-image [2] https://github.com/marktext/marktext