[e3bc54b2]

Forgive the snark because my suggestion is obviously not an improvement or even a match for target audience, but org-mode files with inline org-babel code-blocks is what I consider to be perfect version controlled notebook.

Pity Emacs is not the best on-boarding experience.

[klibertp]

Worth noting that org files can also embed images inline. Unfortunately, I don't think it's enough to attract new users: images are non-interactive, you can't embed any other media, you have to pop a separate window to edit code, you can't embed rendered markdown (ie. headers and paragraphs have mostly the same font style/size), and so on. Sure org, babel, and calc give you a lot of other things to like, but that's if you're already an Emacs user.