My relative has an iPhone X, while I have both an iPhone 7, and a DSLR camera.
At a recent family event I compared his photos with mine and his iPhone X photos look almost as good as DSLR. I did a quick Google search but couldn't find an obvious answer.
Is the most significant improvement hardware-based, or software-based? If it's the latter, can older iPhones be configured to get these benefits (I noticed his images are in HEIC format which my iPhone 7 only seems to use in Burst mode)?