Comment by trhway

>Ah, so it's an inherently asymmetrical force, with the advantage to Ukraine to perform the attack?

yes. Before cheap modern electronics, the costs of attacking vs. defending missiles didn't have such orders of magnitude difference. Drones, ie. cheap electronics, changed the game.

>It can't just be defended against by pairing (or even 10-to-1-swarming) identical V1-class drones from Russia to be used as interceptors?

To intercept you still need to be faster (transsonic and especially supersonic doesn't come cheap/simple), to have radars, a large one on the ground for detection, and seeker on the interceptor (that is cost and complexity) or to guide interceptors using the ground radar (that would mean much less simultaneously attacked targets by your interceptors, less distance and other issues like with intercepting low-flying targets, etc.)