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Russia hasn't used its advanced T-14 tanks or Su-57 jets in Ukraine, opting for older models due to cost, risk, and supply issues.
The UK military expected Russia to deploy advanced systems like the T-14 Armata tank and Su-57 fighter jets in Ukraine but has seen little to no use of these high-end platforms.
Despite their $5 million to $9 million price tag and Russian state media hype, the T-14 has not entered combat, with Russia instead relying on older tanks such as the T-90 and T-80.
Analysts attribute the restraint to concerns over losing valuable assets, high maintenance costs, and the vulnerability of advanced equipment to drones and mines.
The Su-57 fighters have largely stayed within Russian airspace, used mainly for missile strikes.
Western officials say the lack of deployment reflects strategic prioritization of quantity over quality amid supply shortages and heavy losses.
Rusia no ha utilizado sus avanzados tanques T-14 o aviones Su-57 en Ucrania, optando por modelos más antiguos debido a costos, riesgos y problemas de suministro.