The artillery production mentioned here reminds me of how scales changed from the beginning to the end of the war. At the outbreak, IIRC Russia produced ~35K artillery shells per month and was using ~25K per day. By 1917, there was a battle where a combined total of ONE MILLION artillery shells were fired (between the two sides) in a period of roughly 4 hours.
Every war seems to have a defining technology that's new and makes it unlike previous wars. This is rarely clear to military leadership before the war starts so tends to mean the calculations are off. For example, the US Civil War was the first war fought with mass-produced, long-range, fast-loading and accurate rifles, which led to >600K deaths. By comparison, the US lost 400k servicemen in WW2.
In WWI, that defining technology was really artillery. To a lesser extent it was machine guns too. Air power became a factor late in the war but the concepts of aerial bombardment, strategic bombardment and air superiority wouldn't really come into their own until WW2. The real solution to artillery and fixed positions ultimately became the tank But WWi ended before this really took off. Like air power, it would become a huge factor in WW2.
Why this is important is because the war in Ukraine is in many ways similar to WWI. Air power isn't really a factor but the most defining factors are artillery, trenches, fortifications and terrain, most notably the Dnipro River.
Russia has built 3 lines of impressive fortifications that mirror German positions in WWI. Russia's strategy is essentially to dig in, use the river as a barrier and wait for the West to get bored or lose patience with supplying Ukraine such that Ukraine sues for peace and Russia gains territory east of the river, creating a land bridge to Crimea.
But in a WWI style war, artillery is incredibly important. It can be used to cover an advance into a fortified position (eg a creeping barrage [2]). These were tactics that were developed and learned through WWI.
Oh and if you want to see how devastating this can be look no further than Verdun, the so-called "Red Zone" (Zone Rouge) [3].
[1]: https://www.dancarlin.com/product/hardcore-history-50-55-blu...
[2]: https://en.wikipedia.org/wiki/Barrage_(artillery)#Creeping_b...
[3]: https://www.warhistoryonline.com/world-war-i/zone-rouge.html