Do small single-purpose drones reverse the trend toward larger aircraft?

Have drones developed toward smaller single-purpose aircraft, reversing the pattern followed by crewed aviation?

Small single-purpose categories have appeared, but the argument here is that each tends to grow as users ask for more sensors and capabilities.

Small quadcopters and other single-purpose aircraft appear to offer an alternative to large multirole drones. The reply distinguishes the arrival of these new categories from the subsequent development of each category. Additional cameras, sensors and collision-avoidance equipment increase the weight of a small reconnaissance drone. More power is then needed to carry the added load, producing a larger aircraft. The comparison between palm-sized early examples and larger proposed unit reconnaissance drones supports this account of recurring growth.