A startup may have producers who are capable and create a useful product, but the public doesn’t buy it. This is one of the reasons that Silicon Valley forgives its own and lets them have another try. The public is the uncontrollable variable.
Peano Axioms are an example. A new set of materials on Peano Axioms should be of interest. This is because Peano Axioms are already recognized as the proper foundations of elementary math. So materials to help teach them should be of interest.
This runs up against the Fundamental Principle of Elementary Math Ed.