It's a pretty big deal in the Ukraine war. Russia has been using cheap drones to attack Ukraine, which initially only had very expensive SAM systems to intercept. Ukraine then introduced cheap electric drone interceptors which have been working well.

Russia's response was to increase the speed of its drones. As long as Ukraine can match that speed increase with the interceptors, it will still be able to intercept drones cheaply.

> will still be able to intercept drones cheaply

But likely not at the scale required to make a real dent. This is the problem with the "this new weapon will win the Russia-Ukraine war" mantra we've heard so often (Javelin, HIMARS, F-16, etc). Lots of very capable weapons have entered the fight, but at limited scale compared to Russia's enormous manpower and manufacturing advantage.