I am sorry if you see it differently. I think I am still developing good products and I think we are still on top or maybe even ahead of scientific research.
Finally product development for me is and always was reading information, having a good idea, making sure it is quite "fool proof" since accidents and mistakes always happen, testing it for efficiency and optimizing the formula in tank experiments for maybe 2 years, sometimes longer, and then releasing it.
The "natural curve" is always an asymptotic approach to an optimum but never reaching it. In the beginning there are big steps in progress, later the steps get smaller the closer you get to optimum. In my eyes this development can hardly be avoided. You can't repeat the same progress in an advanced stadium that you made at the very beginning of a development.