You are right, the Af of the D5 is killer. But the AF of all newer Canikons is great and often more important than the resolution and the DR of the sensor.
But don't forget, every camera with it's AF has a learning curve for the photographer.
When I shot soccer and ice hockey games for newspapers, 20 years ago,
there where old school photographers with me along the line who shot the manual Leicas or the Nikon F3,
and they where a lot faster than me, with my F4s + AF.
But after some months I learned how to AF-Focus with my F4s and I was able to compete.
For MF I see at the moment only an advantage to use it with a Tech Cam and the best lenses.
Bernard, you should check your 100 MP back with a 23 HR, 28 HR, 32 HR etc. on a Cambo or Alpa etc.
This is in my opinion the only real advantage over the Canikons.
But also these cameras have a learning curve and the Canikons
are getting better and better......