Software developed using visual programming languages often has the potential/necessity to include content which constitutes a 'visual/non-visual hybrid' as the

Software developed using visual programming languages often has the potential/necessity to include content which constitutes a 'visual/non-visual hybrid' as the application becomes more complex: the boxes to which arrows are connected usually contain things which are lines of text/symbols/formulae, i.e. are not 'diagrammatic'. Visual programming languages tend to use diagrams for structure and 'notationally rich text' for content and are therefore addressing requirements for simplifying the representation of and increasing the intelligibility of the structure of application development as their highest priority. The reason why this rationale can seem to be problematic is because justifying/achieving the job of meaningfully 'separating structure from content' in software brings it's own highly contingent/subjective challenges (as any detractor of object-oriented design will be aware). For instance, how far could/should you go in trying to 'diagrammatise' the notational content of boxes in a boxes and arrows language. Is the fact that you are diagrammatising the app at all enough of a benefit in terms of reducing the learning curve/programming aptitude requirement, such that 'further/total diagrammatisation' is nothing more than a 'diminishing returns' consideration? What criteria do you use to decide the 'diagramtic benefit limit'? The biggest growing business in software development today is 'triple A games development' and visual programming languages are used as a way of giving designers the means to create content and gameplay without requiring the designer to have programming skill levels that match those of developers (developers can then optimise the designer's work by converting it into C++ to get the frame rate up and integrating it with the rest of their native codebase). Here's an example of an impressive case in point done in UE4 Blueprints without a single line of C++: https://www.youtube.com/watch?v=EjCandEgtHo https://www.youtube.com/watch?v=EjCandEgtHo