Good points
Once we decide to go ahead, there is no power of this universe that can stop us. IAF gets what it wants. Pressure tactics don't work over them. Now after their blatant refusal of F-21, Uncle Sam wants IAF to procure a substantial number of F-15EX(
@Lolwa, lol), only after that they would consider providing India with around 40-60 F-35s. That's the American game. But IAF has already given a go ahead for Su-57's acquisition and negotiations are still going. While CAATSA may or may not be a factor, our protracted contract negotiations are a real pain in the backside.
Anyways, looks like soon Russia-Ukraine ceasefire would happen and then we could announce Su-57 deal in public or just do everything covertly