Drones aren't that new. The Israelis used drones during Operation Peace for Galilee, they are cheaper than regular airplanes. There are small drones used by the artillery to guide indirect fire and for infantry platoons for surveillance up to drones with a global reach.
The Ukrainian war has showed us what we knew in theory, but now we can see it in reality. How effective modern artillery is. Now it doesn't waste shells, instead it hits what you want it to hit.
Drones will never replace classic artillery .Classic artillery kills more than drones,because it fires a multiple of firepower than the drones can do . And the precision of the drones is not a multiple of the precision of the classic artillery .
Drones were used in the Libyan Civil War,without forcing a decision , in the Caucasus, without forcing a decision ,since 2020 Turkey uses drones against the Syrian Kurds, without decisive results .
And ,about the precision of the drones : on 1 June 2022 Turkey fired (intentionally or not ) a drone on a clinic in the region of Tall Rifat . There was only material damage .
If the attack was intentional,the result was negligible,because of the imprecision of the drone .
If the attack was not intentional,the wrong target was attacked,proving that the drone was imprecise.
All this are examples that you can't hit what you want .