When you people talk of supersonic cruise missiles you tend to forget it still is a cruise missile like any other it can still maneuver at high g-rates and that too with very high speed at 10000-15000 meters come down at 10 m still perform maneuver and crash into the target with tremendous amount of kinetic energy.
Talking of stealth have you heard of SR-71 black bird, it was huge enemy could see it but couldn't intercept it even after trying 4000 times, it couldn't maneuver more than 3gs, flew higher than 15000m what it only had was supersonic speed.
And F-117 was brought down using inferior air-defense systems we are now in the age of powerful AESA radars so stealth won't survive every time...........subsonic missile wouldn't survive against supersonic interceptors in an ECM battle field where AEW&C platforms would be covering every inch of the battlefield.......its the age of hypersonic cruise missiles flying above 6 mach would also outrun most of air defense missiles.........not to forget that they would also fly low and early detection won't be possible............. guess what even the air-defence guns like the ones on Tunguska can bring down a subsonic missile.