Here’s Therese Johaug after her dominant 30 k classic performance at the 2021 World Championship: “I never have been in such good shape. I am so happy. I’m 33 years and I know I’m getting older and older and I know that this time ends soon, so I am just so happy.” What the World Cup field has historically known is a Johaug in shape. Outright, she’s likely the best distance skier of all-time....