I think it comes down to the current version of Pogacar basically not having any weaknesses. He's outstanding in TTs, in hilly terrain and (very consistently) in the high mountains and almost never misses a split in crosswinds. Usually you expect some tension if there's a better climber vs someone who is better in TTs and crosswinds, or if two riders have quite variable climbing performances in the mountains, but we don't get to see this type of action with Vinge vs Pog.
In 2022/23, hot and/or high-energy expenditure mountain stages looked like Pog's decisive weakness, but 2023 once again didn't deliver because Vingegaard took so much time in that crazy TT that the Tour was essentially over. This leaves 2022 as the one-off Tour when the rivalry was truly exciting, also because Visma played its cards perfectly with Roglic as co-leader and peak WVA - and we hadn't really seen Vingegaard's full potential yet.