There are a few successful examples of graphical programming languages used by engineers and scientists everyday. Simulink and Labview are what I'm thinking of,

There are a few successful examples of graphical programming languages used by engineers and scientists everyday. Simulink and Labview are what I'm thinking of, there may be a few other similar ones I don't know about. I actually don't like using these tools too much personally, and yes I suppose they are relatively niche. But there are some people that swear by them, and they really are powerful and useful in their problem domains.