Marco- From a scientific perspective, someone could take what you consider the perfect oven and measure the temperatures, air currents, thermal conductivities etc. Using that information, construct an cube shaped oven with gas burners,ceramic materials, convection fans, and other needed items to mimic the thermal characteristics of a Neapolitan oven. This would likely be too expensive to be practical, but if people can land things on Mars I'm sure they could reproduce the thermal environment inside an oven. The poor little pizza placed into such a beast would not know or care about the shape because it would see the same temperature profile.
Finally, I have enjoyed our spirited discussion but I will rest with these thoughts: In pizza experience you win hands down. I have never even eaten what you would call a Neapolitan pizza. However, I'm not sure I have much interest in it. Though I'll give it a try when my oven is built just to do the experiment. As I indicated previously, I have other intrests such as bread baking, roasting, and drying meats and fruits. For this I want a heavily clad oven to retain heat for long periods, and I like the barrel vault design. So I know going into this project that you can't have an oven that's perfect for everything, so don't feel sorry for me about my choice of oven. I'm sure it will do a much better job than my gas oven and won't heat up my kitchen in the summer. Our views may differ but I can admire your passion for authenticity.