imo Klaebo is neither the strongest athlete nor the one with most endurance, but his combination of great technique and the intuitive feeling of how to transform his power to speed is unmatched. I like the comparison with Bolshunov who has very good technique but cannot compete with Klaebo when it comes to skill on skis. Be it all out speed, max cadence or simply balance in critical situations (not that I approve of Klaebo's antics in that regard, but he is by far the smaller of the two and in clinches came out on top every time). However, Bolshunov is the far superior athlete when it comes to raw strength and endurance.