You should ask why such an old idea were not experimented on large scale, not that is not novel. When solving problem, start with the obvious, then go with mor

You should ask why such an old idea were not experimented on large scale, not that is not novel. When solving problem, start with the obvious, then go with more sophisticated... Your example is just an example that people do not see the defect in the system, not people cannot come up with novel idea.