Phone software can mimic DSLR, but brings new problems
Another basic physical fact happens when you make a sensor larger -- you gain more control over depth-of-field, the ability to focus on objects a certain distance from you and blur objects at other distances. This can be approximated through software effects but those still come with all sorts of limitations -- one focal length, a strange focus halo around the subjects, or varying accuracy -- whereas with a larger camera it’s just how things are.
There are other advantages you aren’t likely to see on cell phones due to how awkward they would be -- extensive mechanical controls, for instance. It was a leap forward in functionality when phones allowed you to take a picture with the volume control switch, giving you one button that you could operate the camera with tactile feedback. At a quick count, the Nikon D5 has at least 37 such controls, many of them extremely customizable. With these, an experienced user can operate the camera, getting ready for the shot that is about to happen, without ever having to look at the camera. And since photography is about predicting the moment, not reacting to it (since it’s too late!) it’s an invaluable addition.