I think these rapid feedback tools are great. And I love the idea of having tools show up in context. The only problem is that they seem to get unwieldy after a certain point. The view of all the different tools / libraries that come with it at the end of the presentation shows that. I have seen a few tools like this, and it seems like they would be more popular. Where you make changes in the code and you instantly see the effect. The ability to see diffs on data before and after looks very helpful.

I learned oop with Smalltalk so the syntax and feel aren't a problem.

I think code organization is the biggest weakness of the system. I like to zoom around a codebase in vi.

Very cool concepts though. Do you have a list of these types of development environments? I recall one that was demonstrated on a graphical output and another "next phase" that was working out keeping up with different database sources. I believe it was a different group, but I can't remember the name of that one.

Awesome work, and a field with massive potential. It's an environment that seems to work better than no-code and low-code environments.