> Proof is in the pudding.
Indeed it is and the proof shows that Ukraine intercepts a large number of Russian missiles with air defence.
Whilst Russia intercepts a lot of Ukrainian weapons with the intended targets.
The Russians have maybe shot down a single stormshadow out of all the ones that have been fired.
They don’t seem so good at intercepting modern western cruise missiles.
This all ignores that Ukraine managed to get TU141 drones that look like they have the radar signature of a truck past Russian air defence to hit targets within Russia.