Also worth pointing out, from my understanding, Russias artillery is more fire a shit ton and cover a lot of space because it's less guided/targeted (and i dont mean gps guided, but triangulation kinda thing), while ukraine is using better tech to coordinate strikes.

So that either means Russia fires the same amount in any given barrage but can't do as many, or they fire less in each barrage which makes their less targeted barrages less effective. Either way that's an extra boost.