Hi,
The answer to that question may be company pride in combination with company management.
But, there is another side. The Canon sensor is good enough. A lot of great images are taken with Canon cameras.
Clearly, the Nikon sensors have better DR, but Canon's DR may be ample for most subjects.
BTW, is this not a Leica thread?
Best regards
Erik
What prevents them from manufacturing their designs somewhere else?
Cheers,
Bernard