The aggressive way Canon is developing incredible RF lenses that are way beyond anything Sony has even dreamed of or can do with the small mount will carry Canon through. Cameras come and go but great optics are far more difficult. Canon will have incredible camera bodies soon enough. Same pattern as the EF system that when completed totally dominated the market especially the pro market. I doubt they will just roll over and let Sony take the #1 spot without a fight. Nikon rolled over and quit by staying with the horribly antiquated flippy levers and whirly gears just to salvage the obsolete mount for "Legacy". when Canon destroyed them and they have never recovered, I doubt Canon will make the same mistake as Nikon did
This is exactly why most (actual) professionals are still using Canon.