[joshe]

Put this on your site. I know that https://nextjournal.com/features seems more like marketing copy, but this is much more compelling.

Just saying "much more", or "fully" doesn't help much. Try removing all the adjectives from your marketing copy to see if it's actually communicating anything. (Then edit, then add some back :-)). Also most of the features on this page are things you get with Jupyter or collab, address what is actually different, like you do here.