They're both already shifting from DSLR to Mirrorless (though Nikon hasn't been as quick as Cannon).
Raw mode with manual aperture/iso/shutter speed is certainly an appeal, but even some smartphones have that.
The big appeal of interchangeable lens cameras is the interchangeable lenses. Camera lenses are still vastly superior for many uses. Not all, but for things like sports and nature photography there's just no way to get equivalent image quality out of a smartphone. Likewise for macro photography.
Raw mode with manual aperture/iso/shutter speed is certainly an appeal, but even some smartphones have that.
The big appeal of interchangeable lens cameras is the interchangeable lenses. Camera lenses are still vastly superior for many uses. Not all, but for things like sports and nature photography there's just no way to get equivalent image quality out of a smartphone. Likewise for macro photography.