My mind immediately went to the scripting systems, visual or text based that allow level designers to create the game experience in a programming portal that ma

My mind immediately went to the scripting systems, visual or text based that allow level designers to create the game experience in a programming portal that many are unfamiliar with. The blueprints of Unreal Engine. The shader graphs. All of the best allow for working interactively. Smalltalk's vision is partially embodied in Unity where live editing works for many things and the feedback loop is often instant. But nothing really achieves fully what has been envisioned. One of the reasons why utopias don't exist for programing portals for serious work is the flipside of programming - debugging. If and when they succeed for anything more than the simplest uses, they can come up against a lack of good systems to collectively inspect and reason over failed functionality or performance. I still love things in this vein. Shadertoy and Graphtoy come to mind.