The problems with visual programming have never changed: at one point you need functions, macros, identifiers, user-defined types, error paths, diffs... (EDIT:

The problems with visual programming have never changed: at one point you need functions, macros, identifiers, user-defined types, error paths, diffs... (EDIT: it's an idea that doesn't work at all for _general purpose_ programming, but for some reason it sounds like a good idea from a distance).