What gui elements do you find lacking I'm not familiar with ZWEI

Basically think of using Emacs like a Jupyter Netbook, including the visualizations.

Back when I was still into Emacs (2004) this wasn't possible.

That's possible now, you can render images inside buffers.

Render images alone is too basic, that was already possible in XEmacs.

I really meant like Jupyter Notebooks, interactive images and data structures, that you can click on and change to your pleasure and plug into Elisp code to be called back.

Org-babel does this, and is less limited in language choice than Jupyter; you can use any language for which a binding exists (there are many, including Python) in any code block, irrespective of what you use in any other. The interfaces are pretty clean, and you can have inline images, although I think not interactive ones. Data structures are expressible in code or in tables.

I don't use it much these days, having less need for that sort of highly interactive exploratory analysis, but I did find Jupyter highly limiting by comparison.

Thanks, I will have a look into it, if anything at least not to spread misinformation.

You can integrate jupyter notebooks into emacs so in particular everything "like jupyter" and more.

That is not the same as it doesn't work with Elisp, and hardly brings any value from Emacs itself.

Oh I see. Ya fair. Though honestly even in Jupyter notebooks I don't often see many people making use of anything more then static renders.