Does anyone know if interchangeable ovens are in the making?
I'm not sure what you mean, but if you're asking whether the Pax 2 will have a cartridge system at some point, I'll bet a lot of money on no.
Back to the oven lid flying off: it occurred to me that I could test how strongly the magnets hold the lid in place by holding the Pax and just snapping my wrist. If you try this with your original Pax, make sure the oven is empty and that you'll be able to spot where the oven lid lands. It doesn't take much to send it flying.
No matter how hard I snap the Pax 2, the lid doesn't budge.