On: I've been building a Markdown note-taking app for ...

[bloopernova]

oh lord I've become "that guy". My first instinct was to say something along the lines of "well emacs and deft will do blah blah blah blah blah".

This looks really slick, and actually fills a need I identified about a couple of years ago. Namely a OneNote style app but with Markdown.

Nice job, I hope you get a lot of paying users!