The FPV drone "kill zone", which used to be several km from the front line when the war started, has recently pushed to ~15–25 km. Some FPV drone strikes are now reaching 50-100km(!) past the front line. This means that artillery must operate at the edge of its effective range, and soon, will be completely enveloped by drones. I predict this will happen by early 2027.
Once the kill zone crosses 30km, artillery will be effectively unusable. Artillery needs a constant source of ammunition, and if this ammunition cannot reach the front, artillery is useless. Ukraine understands this, and that's why they're investing in drones over technology like artillery.
Germany, meanwhile ...