You’d probably like Bret Victor’s inventing on principle talk: https://m.youtube.com/watch?v=PUv66718DII

He demonstrates some good examples.

I’m not quite sure it’s what you mean by visual, but it seems obviously valuable and tools that enabled some of what he shows would be really useful.

I’m not sure why we don’t have these things - I think Alan Kay would say it’s because we stopped doing real research to improve what our tools can be. We’re just relying on old paradigms (I just watched this earlier today: https://www.youtube.com/watch?v=NdSD07U5uBs)