With all this talk about the efficacy of drones, it reminded me of a comment from lesscredibledefense (paraphrased):
When one is forced to adopt a different strategy due to the enemy's superior capability, that is not a work of genius, it is simply making the best out of a shitty situation. Your original strategy was chosen for good reasons, and anything else is simply suboptimal. Russia and Ukraine are using drones not because they're better than ATGMs, but rather because the ATGMs are too expensive, are easily blown up, or a combination of both.
Tell me, would the US use small drones in a second invasion of Afghanistan? Drones are not the future of warfare, only a part of it.