Each rider is different. In my view, Remco was too much ready for that Giro TT, but not the mountains and Covid sealed his fate. The WTT victory, again in my view, came at the expense of the Vuelta climbs as was evident. But then an untimely crash led to a proper approach to the Tour, where he was both good in the TT and mountains. By contrast, despite his travails, Roglic seems to get ready for the next big appointment with admirable aplumb. Everybody has his own head, dietary habits, etc. I think Remco has finally learned where he needs to be weight-power wise to perform. For others like Roglic it comes naturally, because he is wise and carefree, whereas Remco is young and reckless and thus needs direction/discipline.