A take away from this scenario might be that this design space is wanting for a meta-editor. Some tool which allows feature creation in the same context as these markdown/note tools. An analogy might be that this meta-editor is to digital note keeping as racket is to programming languages.
Of course all the obvious requirements apply. Has to be usable out of the box, has to just work, has successfully convey it's ability to be changed to the end user.
I think emacs is such a solution, there are no features in the list of hn posts under the search "markdown" that it doesn't have. But emacs is missing all the requirements. It is not usable out of the box.
I think this meta editor could best be built on top of emacs, but this will require a lot of work. I have been playing around with this idea for a couple of years now and it's slow going but fun to think about.
[1] https://prosemirror.net/ [2] https://standardnotes.org/extensions
iA Writer: Write something eloquent
Still searching for a markdown editor that runs on both iOS & Linux and does auto save & auto sync.
You don’t even need the same editor. You can use one on Linux, one on iOS and another on Windows.
In the discussion above saw many good suggestions, none that fitted the requirements.