This was the first GT that he finished without some sort of hindrance. In the Tour 2018 he was still "green" and he had a rock in his elbow that cost him in the final TT. 2019 Giro was a horror show from week 2 onward with him getting sick, crashing and having abbysmal team support both form the staff and riders.
2019 Vuelta had the TTT swiming pool crash, a motorbike crash on gravel of Andorra, the crosswind fail and the heavy crash in stage 19 that cost him some energy on the last mountain stage.
2020 Tour was right after that really bad Dauphine crash and he was not at 100% during the entire race, and Vuelta 2020 he was dead tired (plus some jacket mishaps). I won't even mention the disaster at the Tour this year.
But this Vuelta was finally mostly problem free. And it show on the final results. He was in good shape (though preparation was not 100% ideal - no altitude camps and such), he was stress free, the two crahes he had did not influence his form, the team was good, the decisions from the DS camp were correct and most of all, he was up to the task. I really enjoyed the race from start to finish - especially in this last week. Maybe this will put the "Roglič always fades in the 3rd week" stories to rest.
Now he should finish the season on a high - I don't think he will be at the WCs, but will definitely do the Italian classics - Lombardia is still on his list. And next year, hopefully luck is finally on his side in the Tour. If he has a good preparation and is not hindered by crashes, injuries, sickness and silly team decisions - I think he is capable of winning the Tour - even against Pogačar.