Kuss is an amazing climber but will always struggle in stages like today, especially if wet. He's not a racer.
And there's nothing miraculous in Roglic limiting his losses.
Only George Bennett & Roglic "survived" among the Jumbo guys today after the final descent. That tells me what happened was way, way more interesting than Sepp Kuss merely showing limitations on this sort of wet stage.
If Kuss had blown up, so be it. But the entire Jumbo team - except two - were also dead. Very strange. It looked like Roglic had to dig pretty deep to bridge a gap & then paid for it on the climb.