Another day, another trainload of dead Russians, somedays it's two trainloads. The vast majority of them killed by missiles, artillery, mortars, FPV drones and grenades dropped from drones. I think relatively few are killed and wounded by small arms fire in direct combat, advances day and night are spotted with drones, and nothing moves without being seen and often dealt with before they reach Ukrainian positions. Low ammo, interdicted logistics, drones and Ukrainian radar directed counterbattery fire have stripped away a lot of the Russian artillery support. They are making unsupported infantry attacks, and their armor has to stay well back from the front because of drones spotting for artillery or FPV drones attacking them directly. It is the same for the Russian supply trucks, a favorite FPV drone target and they can hit them on the move too. I've noticed they are using tracking or just directional antennas on poles in some cases to greatly extend the range of their attacks with better line of sight for the signals.
They might be short of shells but are trying to make up for it with small drones, like they will make up the difference in missiles with long range suicide drones. I see lots of footage where artillery or even a Javelin might be employed to destroy tanks and APCs, but a drone was used instead. I dunno how many tanks, APC, trucks and light vehicles the Russians lost to FPV drones, but it must be in the thousands by now and total up to billions in terms of dollars. The pilots need training to fly them but not too much and many can learn in a couple of months with the help of a good simulator program to train muscle memory. You don't need to be an expert pilot to fly into a tank, just good enough to hit a small barn door!