What happened to Canon's perfect 1.3x crop factor pro camera line? I miss the APS-H Canon EOS-1D Mark III

Canon EOS-1D Mark III being held by Canon employee at the camera's launch in Japan 2007.

I can still remember the first time I shot a superbike racing event with the Canon EOS-1D Mark III. Just to clarify, that’s not a typo. I do mean EOS-1D Mark III. Not EOS-1D X Mark III.

While the original Canon EOS-1D launched in 2001 – 4MP sensor, anyone? – it was the Canon EOS-1D Mark III (released in May 2007) that really left its mark on me.