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by vvanders 697 days ago
Not even all textual languages map well to every problem space.

Blueprints are a good callout(and Kismet before them). Many PLCs[1] are heavily visual language based with Ladder, FBD or other variants. I wouldn't be surprised if they were the most widely used application of visual programming languages.

[1] https://en.wikipedia.org/wiki/Programmable_logic_controller