Once described as “the best tank in the world” by Vladimir Putin, the T-90M recently hit a milestone that raises a few questions about the Russian president’s appraisal. According to the open-source investigative project Oryx, 100 of them have either been destroyed, damaged and abandoned, or captured on the battlefields of Ukraine. With Russia’s total tank losses last month surpassing 8,000, and only an estimated 67 T-90Ms in active service when Moscow launched its full-scale invasion, what does this say about the state of the Kremlin’s armed forces? How good is the T-90M?It’s not Russia’s top…