Image from any digital camera (SLR or Phone) is result of computation, unlike that from film camera where image is result of chemical reactions. Optics (glass)

Image from any digital camera (SLR or Phone) is result of computation, unlike that from film camera where image is result of chemical reactions. Optics (glass) does not play much role in phone camera cost or product development; but the cost (effort) is a factor of sensor, CPUs, NPUs, DSPs (hardware) and then investment in writing image processing software.