Jorgenson was too strong. There wasn't much TP could do. If he had jumped on Piganzoli immediately, they'd have gotten countered by Jorgenson. Visma could play out their strength in numbers. Don't think there was anything he could do. Onley & all others were pretty much blown by then.
Narvaez had put in a couple of strong attacks in the preceding laps for McNulty & Yates and I think those killed the legs of everyone in addition to the San Luca climb.