i think artillery fell out of favor in some peoples minds over the last decades because of two reasons
first, aircraft do the same job, but better (drop big bombs on targets far away from your own positions)
second, aircraft easily blow up artillery (because static positions, easy to spot, hard to conceal especially when firing)
from these it follows that when you have air supremacy, you dont need artillery because you can just call in air strikes instead, and when the enemy has air supremacy you dont want artillery because its just gonna get blown apart by enemy air strikes as soon as it is located
but in this war, no side has real air supremacy. it feels like either sides air defense is stronger than the other sides air presence, so large scale air strikes are not available, which means large scale artillery use is back on the menu again