In April of 2022, people began to ask if Russia could run out of artillery shells. The arm-chair generals laughed, and said that Russia had enough shells stored up to keep this pace until December! Then October rolls around and the shelling decreases to a level just above their production.
At the start of the war, every day there would be long range missile barrages. Now they save up what they produce over the course of 2 to 3 weeks and shoot them all at once (which is a better tactic, overwhelm anti-air, too bad they aren't hitting anything of military significance).
At the start of the war, they were using brand new high tech tanks, and even having contests and parades using the old tanks. Now Soviet era tanks are on the front line. At the start of the war, when sanctions started, the Ruble went up! Now even Moscow is admitting a spending deficit. At the start of the war, Russian patriotically signed up to serve. Now Wagner can't even recruit prisoners with full pardons.
Ukraine has near-infinite weapons and finite people. Russia has near-infinite people and finite weapons. The looser of the conflict will be who runs out first: Russia's weapons or Ukraine's people.