I think it comes down to space and topography. In the Banana Belt of Ontario, you guys have lots of space like we do in the Great Plains and Ohio and Texas for monster tractors to roam, and you need them to cover the ground quickly while the ground is dry, the sun is shining, crops are ripe, etc. For those of us on smaller 2-20 acre plots with lots of hills and gullies and trees, a big tractor just simply won't work. Same case for in Europe and Japan. For those of us in limited spaces with still with some needs for a tractor, we've gone to 2 wheelers and CUTs and SCUTs.
I first went with a Gravely and just happened upon a for sale with almost all the implements that I wanted when I first moved into my 8.5 acre retirement property. It served me well for 4 years and is still serving me in places and instances where I can't get to with my JD 4010 acquired last October. It has a FEL which is a great big wheelbarrow and small dozer. It also has full Cat 1 rear lift capability. I've used both well since taking delivery of it.
Ralph