I've been following the ISW blog on Ukraine quite closely. It really does seem like small, cheap, commercially available drones are increasingly widely used on both sides. They're used not just for direct strikes, but also reconnaissance and transporting supplies. They're more expendable and easier for teams on the ground to deploy. They typically can fly at lower altitudes and therefore are better at avoiding modern air defence systems. Also they're a more recent innovation, which typically means the enemy has fewer strategies already in place to defend against it.