Conceptually when do people think is the right time to switch from one of these visually languages (optimized for asthetic and visual approachability) across to text based coding?
What key 'ah ha' moments for the new student define when they are ready to cross over?
My guess is that the corresponding ah-ha moment is when programs grow to where they depend on the benefits of modularity.
And I'd argue that it's because LabVIEW is meant only for R&D purposes. It does work fairly well for FPGA-based applications but that's often because those programs are fairly compact and uncomplicated when done right.
I wish there were a more modular and useful version of LabVIEW (or G or whatever the language is called) because I'd like to use something like that. Not having to worry about execution order is a marvelous thing, and it really transforms the way one thinks.