Are you sure ? It would be faster than most electron based editors

How about opening Word documents and being able to save them to Markdown in one click? That's super useful to me.

To copy/paste LLM outputs with maintaining format.

Open .docx file, save as Markdown to nicely preserve things like headings, bold, etc. I moderately frequently have reason to want to go .docx to .md because I have a lot of ediing/rewriting to do and I'd rather work in Emacs than LibreOffice Writer.

Obsidian does this. It displays the raw Markdown for the line under the cursor, and renders the marked down content everywhere else in the document.

These things generally already offer side-by-side page layouts anyway, no?

Doesn't seem like that much of a stretch from a UI perspective to do something similar with a Markdown preview.

Honestly I always prefer the "non-rendered" version, it looks way nicer and readable to the eye.

Google docs allows using markdown hashtags essentially as shortcuts to switch to title, subtitle, subxntitle