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.
3000 killed and $1T property damage/rescue expenses in a day doesn’t need to be matched by drones to make an impact. A single, Luigi style, untraceable, car or house impact, would make the oligarchy apoplectic. Though car bombs and hand grenades/molotovs have existed for a long time.
Not sure why you are comparing 9/11, a terrorist attack that targeted innocent civillians, to the shooting of one evil CEO which is a surgical strike that have resulted in zero innocents dead.
OP is the one that made comparison. Terrorism gets more attention if victim is oligarch.