Visual Studio Code, with a directory hierarchy of notes. Doesn't tick your not-Electron box, but should meet all other criteria. In my opinion, its Electron-ne

Visual Studio Code, with a directory hierarchy of notes. Doesn't tick your not-Electron box, but should meet all other criteria. In my opinion, its Electron-ness is only really noticeable at launch time but once it's launched, you hardly notice it at all.