I suppose Lithuania qualified for women's world championships for the first time. Skip Virginija Paulauskaitė will debut at the age of 53 after she won silver medal in senior world championships. Incredible example of sport longevity
However, the tracks are not really comparable in terms of profile and the athletes are also used to this in terms of training volume.
And the World Cup starters could certainly start two 50ks in two weeks, but after that they would definitely be out and if the next race is two days later, it's just not feasible.