[kecks]

No, because every language has one specific set of abstractions and interfaces chosen by the language's developers. This is the same for textual and visual programming languages alike.

What might well be very hard is making a language where all abstractions and interfaces map to useful graphical representations; I imagine it's much, much easier to represent a JSON object graphically than it is to represent a piece of C code this way.

For instance, how would jumps look? Lines going from far-removed boxes, producing code that literally looks like spaghetti? Moreso, do you even want to graphically represent things like pointer arithmetic, will this be easier to work with? How do you represent variables, globals?

Maybe you would only represent course features such as data flow graphically, and hide finer grained details and code in "blocks" with labels and defined in- and outputs. You would still mostly write your code, but the graphical view might help you mentally model your program.