Planes were used in the world wars, then we have 9/11. This is the post 9/11 era where air travel sucks so much.
Similarly:
Drones are now being used in the Russo-Ukrainian war. Eventually, there will be a “9/11” with multiple coordinated drone attacks and then the way drones are treated will be forever changed. Civillian ownership of drones will likely be heavily restricted or entirely banned.
History rhymes.
Isn’t that the whole point of those past? That it hasn’t yet, but plastic based explosives are easy enough to make at a quantity that could kill several people and could be delivered with a drone to do so. This would be a new form of terrorism (new in the sense that it is available to the public and not just state actors) that would be similar to 9/11 if perpetrated at scale.