Not sure humanity learned nothing before the last 8000 years. It was just very slow. Maybe we will need new ways to learn

Great project and build. I wonder if using a small fan would not help energy transmission, which is eventually the goal of cooking. It may also make the oven work like it’s at higher température while not consuming much energy. It would discharge energy from the walls faster using convection in addition to radiation.

Plus, you can experiment with tray materials depending on what you want to cook.

Suggestions inspired by my experience with convection/classic oven and copper pizza plates

https://www.italiancookshop.com/products/hammered-copper-rou...

It seems that any problem solving starts by defining the data.

« Always define your variables » is the first thing I learned during my engineering studies, in both math and physics class. Professors were insisting a lot about it. I still consider it is the most important thing I ever learned 10 years later.

Seems quite true even in a non-software large company. The work about work is often more important, and certainly is for promotion related progress.