The two systems are definitely not in the same league (agreed!), if that&#x27;s what you&#x27;re pointing out.<p>That said, the time required to calculate an intercept point is not the hard problem, so 1-2 seconds versus 30 minutes is not really super relevant.<p>Arguably more relevant factors are detection, precision, accuracy and ultimate intercept effectiveness.<p>In the case of ICBM you&#x27;re essentially trying to hit one bullet with another bullet... hundreds of miles away. It doesn&#x27;t matter that you have 30 minutes to think about it. It&#x27;s still ridiculously hard to actually know there&#x27;s an icbm, where it is, and then be able to hit it with another missile (and have that make a difference).<p>RPGs around a armored vehicle are way more straightforward by comparison. The projectile is easier to detect, it&#x27;s a much smaller volume of space (easier to scan continuously) and the projectiles are traveling slower!<p>Still I imagine it&#x27;s quite a trick detecting incoming then swiveling, aiming and firing (accurately) your defense auto-cannon all in 1-2 seconds.  It would be very impressive to see that in action.