then I'll take the first point. because the traditional system is still commonplace where I live.
Then, can you provide input that the application of a traditional economic system is able to compete with or be parallel to other economic systems.
The traditional economy definitely can't run side by side the others. Such economy is literally an agrarian economy with most crude technology, low human capacity for production, though it may be based on individual survival level. Therefore, it may not be organized to handle the digital economy as the globe is heading off to. They may not adapt as other economies are to technological changes.