Ask HN: Multi-node tabbed text note editor/organizer

On windows I can still use KeyNote NF for editing notes, but there has never been replacement. Even cherrytree is only for a single xml tree. I used Jreepad until it became to difficult with modern macOS, but it has the same single xml tree issue. Is there anything out there I have overlooked for macOS? If possible I'd like to use it on linux as well and then I can sync between my mac mini and desktop linux.