In Avengers: Endgame, did the time travel only become possible due to the Infinity Stones being destroyed?
During the events of Ant-Man and the Wasp we learn that the original Wasp has been living in the quantum realm for around 30 years, however when she gets rescued at the end she's aged according to the "normal" flow of time outside the quantum realm. And as far as I remember she doesn't mention it only feeling like 30 hours either.
Scott Lang is stuck in the quantum realm for 5 years he gets out saying it only lasted 5 hours for him.
Did this new flow of time only become possible due to Thanos
destroying the Infinity Stones
and thus breaking the flow of time, and creating the possibility of time travel?
The Sorcerer Supreme seems to back this up when she tells Banner that the Infinity Stones are what created the flow of time.
I would find it unlikely that Hank Pym wouldn't have investigated the possibility of this before, had there been any hints towards it from Janet.
And if that is true, then wouldn't time travel become impossible again once the Stones are brought back to the current timeline?