There's a few visual languages I would say have thrived like Labview and UnrealEngine, a couple things in the real time audio/visual space I forget the name of,

There's a few visual languages I would say have thrived like Labview and UnrealEngine, a couple things in the real time audio/visual space I forget the name of, etc. But beyond those niches it hasn't caught on. One reason for this is editing is awkward. With text you can have things in a broken intermediate state while you make changes, copy and paste, etc. The tools for doing this with a visual graph end up being more awkward and slow vs a programmer practiced with their editor/ide. And the other problem is the graphs become a huge mess past some threshold of complexity. Even with boxes it's bad. This is a very common complaint about LabView. Example: http://forums.ni.com/legacyfs/online/4106_spaghetti.gif http://forums.ni.com/legacyfs/online/4106_spaghetti.gif I'm very skeptical a visual language will catch on for programming in general.