I'll preface by saying that vvvv looks impressive and certainly seems like one of the more polished options in this space. We have a type of visual programming as part of an internal configuration tool, and I will definitely look into vvvv for how things can be done differently.
I'm not saying it's bad – it might just be a question of habit whether or not graph edges are better than named identifiers in text, but it is hard to build away, even with best in class tooling.
That said, this screenshot from one of your tutorial videos highlights the type of thing I think people are worried about: https://i.xkqr.org/screenshot_2020-04-27T09:47:46.png
I'm not saying it's bad – it might just be a question of habit whether or not graph edges are better than named identifiers in text, but it is hard to build away, even with best in class tooling.