The Soviet-era T-72 Main Battle Tank (MBT) continues to prove its worth in the Ukraine War, showcasing its resilience and adaptability in ways that newer tanks, like the T-14 Armata or the American Abrams, struggle to match.
Even the Russians have better tanks than the T-72 which they have not committed to this battle. It is ridiculous to say the T-72 is the best tank on earth.
If you bothered to RTFA then you'd see that what makes T-72 such a good tank is the balance of functionality and simplicity. What matters in actual war is that the machine is reliable, that it can be repaired easily in the field, and that parts can be produced quickly. Incidentally, this is the same lesson Germans learned in WW2 where their Panthers were technically superior to T-34s, but were too expensive too make and too difficult to maintain.