As I understand you suggest a cutout in the body of the computer itself. For sure, aesthetics are important to Apple, and that prevents them to deliver this design. But also, the cutout would be in the bottom part of the trackpad, so I guess Apple would have to downsize the trackpad or to give it a weird form. I don't see Apple going this way, they will probably refuse to implement it for years until they can deliver FaceID without these kind of compromiseCouldn't they have the sensors and camera 'sticking out' from the screen, and then for when the screen closes have some osrt of cut out where they slot into? This would not only allow face ID but also allow for far better quality webcams surely?
Is the only reason not to do this because of aesthetics, or would there be other drawbacks?