I don't think 140km of TT would have improved his GC position in 2024 - Jonas and Pogi are time trial monsters.
they've both had some truly bad TTs as well
One thing that 2 long flat ITTs would do is make Vingo and Pog come in 1-2kg heavier for TT power. Would that affect their climbing times? Or would they concede minutes in the ITTs and trust they would gain them back in the mountains?