A fast and powerful post fx Depth of Field for the compositor, where you click and maybe an AI works out the depth or however it works and then applies a nice realistic DOF blur to it. Rather than having to do this process manually with a lot of messing about or with photoshop. I think some of the modern cell phones can do this with their post fx where you just touch and it adds fake DOF.
The reason being is to generate realistic strong DOF during render i need an insane amount of samples especially if im using denoising as well, in order to eliminate patterning and artifacts and just get realistic DOF. it’s certainly impossible in under 1,000 samples.