Nintendo manages to baffle me sometimes. They litteraly waited 5 years to announce DLC when hopes for this course of action were lost a long time ago. I honestly thought they would simply ride the whole thing but now they decide to double down the number of courses and basically less than half the price of the original.
2021 was the first time MK8DX was down YoY even if only slightly. Without this DLC it would be further down this year. It was essential to release this as soon as the steam trains begins to slow to reignite it more than ever. This was very strategic.