QFT IS the obvious next-step, but the reason people play with standard quantum formulations instead of trying to work in the context of QFT and ‘push the interpretation down’ is that QFT isn’t yet on firm footing.
QFT IS the obvious next-step, but the reason people play with standard quantum formulations instead of trying to work in the context of QFT and ‘push the interpretation down’ is that QFT isn’t yet on firm footing.