alt Hacker NewsPerun (Australian military procurement geek) presented the maths for missile defence vs. attack and it's heavily weighted in favour of the attacker.[1] He also previously analysed the Ukrainian truck-full-of-drones attack against a Russian airbase and it was in this video (sorry no link I can't find it quickly) I think he investigated whether the cost-benefit exists to bury military and critical infrastructure underground (or use heavily hardened buildings).
Both topics are very relevant to the current conflicts of eastern Europe and the middle east. Perhaps I took away the wrong message but I don't think Perun would propose to stockpile interceptor missiles any time soon.