I can fully understand that both canon and Nikon have seen that DSLR have reached the end of what i# possible , even mega mp sensors bring there own problems except for a few that need them or do they .
The future is mirrorless ,I tried the canon full frames 1D series , then as old age got its grip on me I sold them , changed to eos.m but that meant still using heavy lenses for wildlife , then last year switched to Panasonic with the 100-400 lens but found it lacking for b.i.f most of the time . So changed back to Nikon for six months but keeping up with developments I realised the Olympus firmware updates had changed the playing field .plus a heart attack in the summer meant I had to reduce carried weight .
I’m more than happy with my mkii I run it with the EVF live all the time hence no black outs when tracking b.i.f ,really looking forward to the winter season now
changed systems to MFT olympus omd1-E.M1X , Olympus 100-400 zuiko .., xiaoyi 42.5mm f1.8 . four thirds mmm-2 ,, four thirds 11-22.. and pergear 60mm f2.8 macro