I wanted to develop such a graphics framework for another Project anyways and a Project like this is a good way to develop it while being able to easily test it, which would be way harder in the other project I want to use visual programming in.
I had closer looks at other frameworks before, but the problem that always emerged was that they are frameworks and that I need a library at most.
There also is noflojs (https://noflojs.org/
I gotta try your MAX/MSP Plugin though, it looks really interesting.
The key feature of the thing I want to develop is probably that it visualizes the data while it is running in the editor itself.