In my opinion, if people want to move from one brand to another... let them. If they move from Canon, they'll move from Sony also. Let them chase technology and lose a lot of money in the process... selling off the old and buying into the new...
The fact is, all of the major brand manufacturers have come out with stellar products in the past decade. Nikon has done it, Sony has done it and Canon has done it also.
When Canon came out with the Canon 7D Mark I, the entire industry marvelled.
When Canon came out with the Canon 5D Mark II, the entire industry was abuzz.
When Nikon came out with the Nikon D800/810, the entire industry was ablaze.
Since then, each of these products have been eclipsed by newer, faster, more accurate technology in varying degrees.
That is the nature of the industry. New technology lasts only for 2 or 3 years before they are eclipsed by something better.
If one is patient, Canon will come back and 'wow' the world once again. It may be with the next Canon 1Dx Mark II, or the Canon 5D4 or something completely different. It's just a matter of time. Those who are patient and do not sell their lenses and bodies are the ones who are going to benefit the most.
Those wish to chase technology are like guinea pigs on a circular treadmill... it will NEVER end.