How to evaluate the full-pixel dual-core focusing of 5D4?

For most experts in the photography industry, 5D4 full-pixel dual-core focusing can be said to be a revolution in Canon's imaging industry, including micro-single, and 5D4 has been said to be an "invincible lion". Before the emergence of this technology, photographers had to endure the defocusing and insufficient coverage of SLR optical focusing, or had to accept the degradation of image quality caused by focusing on a micro-single chip, and full-pixel dual-core focusing realized the framing coverage of phase focusing and the fineness of each pixel focusing for the first time in the camera field without reducing the image quality performance, which will greatly help Canon deepen the micro-single market in the future. For the photographer personally, it is also the process of qualitative change of photographic equipment.