Why are visual program control flow diagrams and diagrammatic languages, which are used to visualize programs not used to program those larger "serious programs"? Why not? They seem like a nice overview of the code.
In the thread What software programming languages were used by the Soviet Union's space program? a visual language is mentioned (Drakon) and I wondered why such approaches aren't used more often?
Is there nothing else, than a visual control flow representation like class diagrams etc. which are 1-to-1 with code, something else instead of "typing in" letters in an editor?