That's a good guess, but it has to be said it usually doesn't happen. There are always those, who have health issues or who decline/have bad seasons for whatever reason. There are also those, who have good talent, but are capable of putting in only 1-2 good seasons before going down. A good example would be Maja Dahlqvist, who had a fantastic season last year, although that victory eluded her. Now she is a shadow of her former self.There's going to be a lot of good racing, assuming everyone stays healthy.
Well, I guess hopefully there will be good competition at the front and the era of Johaug beating everyone by a minute is over. Then that should be good enough. In this respect the Tour de Ski races have been pretty good.