I just read a profile of Matheiu van der poel's bike, and he is using Dura-ace di2 with double chaineings.

I had thought for a couple years that 1x had taken over the top level of cx, but I guess I'm wrong?

Is there any advantage to 2x for cx? Or do you think it is just because he is Shimano sponsored?

(it doesn't seem to be hurting his results)