Well, then so far drones are a bust, because they haven't been able to chase tanks off the battlefield.
@Kamaji How long have tanks been around?
How long have tank-killer drones been around?
Tank-killing drones are still a new technology,but this technology is developing rapidly when it comes to Soviet tanks.
Don't forget that it is not really necessary to "kill" the tank. All you need to do is kill or disable the tank crew,and being inside one of those SOB's when a couple of drones loaded with HE come a-knock,knock,knocking is NOT something that *I* ever want to experience.
Now,to further "seal the deal",how long does it take to train a tank crew to the point where they are effective,compared to hold long it takes to train a drone operator that might not even be in the same country as the drone he is guiding?