What he doesn't mention is that the Russians have placed high priority on targeting the new weapon arrivals, the M777 and Cesar howitzers and the HIMARS rocket systems. I think it is fair to say that once you punch out one of these systems with an artillery shell, you almost necessarily get rid of the trained operators. Ukraine is also finding out that the new howitzers are not robust for service. The M777s were delivered with only optical targeting sights, not digital ones, and the optics break their mounts after enough shots---so the Ukrainians have to dismount the sights before making the shot, and then replacing them. Also, the barrels are starting to wear out, which degrades accuracy and range. Western weapons are turning out NOT to be Silver Bullets. Russians like to post photos of abandoned and burned-out hulks of erstwhile brand-new Western armor. (And since the Ukrainians seem to prefer using the new weapons to shell civilians in Donetsk, it is a fraud to say they would or could make a difference in the military situation.)