If it is being proposed as a new way of doing general software development, yet it could not create the system itself, then it has clear and profound limitation

If it is being proposed as a new way of doing general software development, yet it could not create the system itself, then it has clear and profound limitations. Most markedly in the case of visual programming paradigms, it means they haven't solved the problems that have tripped up visual programming all along - what happens when things get complex? The approach of encapsulating things to present bundles of code as a black box is a good one, but it needs to be paired with a powerful navigation interface that allows flying down into those black boxes pretty instantly, and figuring out how you can be viewing the internals of those alongside the 'outer' code at the same time to understand how things are interacting when things go wrong.