Typical Indian behaviour of washing the soap before hands and boxing above weight.
We saw the same racket when the deal for 126 Rafale was signed and six years later, look where it stands now, we also know how the Admiral Gorshkov went pair shaped, then the fanboys were raving over the MiG-29K.....terming it the best in Asia, whatever it's capabilities, with the IN it was once tethering at 15% operational availability.
Not to mention the struggling production and maintenance of the MKI.
As for S-400, if all goes to plan, it will be a few years before it becomes operational with Indian forces and who knows by then, what else would be sitting out there.
Here's a small example, when Tejas started life, there was no sign of say the JF-17.....and look where they both stand today.