From the description on the video: "Contractor Bijker Bulldozerverhuur of Rouveen, The Netherlands seen busy with deep ploughing using a Caterpillar D8H. D8E and D6R with a combined horsepower of 650HP! The plough is self-build and goes to two meters deep. The top layer soil is ploughed under and the lighter sand and peat soil is brought to the surface to make the land more suitable for other crops and easier to work on. "
Transporting a D11 between job sights would be very, very expensive vs smaller machine. D11 is intended to be assembled at a job sight and stay there most of its life.
D8 can usually be hauled down most main roads in USA not sure on load restrictions in the Netherlands
Many years ago in Wisconsin they were using 2 D9 cats to
pull a 6 foot plow to plow up a swamp and they were really
going deep not like it the above video