Oude Geuze said:
There’s no doubt he would still be comfortably in pink with a strong team. However, Carapaz would probably now be quite close and would pose a real threat. On the other hand, his level of fatigue would also be lower, so it’s hard to say. Not at all certain he would win even with a strong team, but today is the only day he would have lost significant time to main contenders even with help. Although not as much. Nibali seems to be the favorite to win now however.
Looking at the previous mountain stages I honestly don't see where a better team would have made a huge difference for Roglic against Carapaz.
1) He would probably also have lost a decent amount of time to Carapaz on the climb to Lago Serru, as team mates are less useful on a climb that steep. The game with Nibali makes it impossible to say this, but given that he and Nibali distanced Sivakov, Formolo and MAL on their way to the top, it's probably safe to say that they did not play games all the way.
2) Maybe team support could have had a bigger impact on the stage to Courmayeur, but even there we saw how Carapaz basically created the huge gap against a super strong Caruso who was setting the pace behind. On the way to Courmayeur, it is highly doubtful that one more rider to chase down Carapaz in the form of a Jumbo domestique would have made a big impact. So I doubt that a teammate for Roglic there would have made a significant difference to the time Carapaz gained. It is quite clear that he did not have the legs to go with Carapaz on Colle San Carlo.
3) Then we have the Como stage, where obviously better support from the team car would have been appreciated. He was not far off from holding on to Nibali and Carapaz as they went on Civiglio, but I still have my reservations on whether he'd have lost time there anyway. Maybe not 40 seconds, but possibly 20 seconds.
Overall, it would probably take a 2017 level SKY train to to save a significant amount of the time lost against Carapaz. Yes, Jumbo Visma have been terrible (one might wonder why they brought such a **** team in the first place), but I don't find that the addition of Gesink or De Plus would have changed a whole lot for Roglic.