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Pretty sure that's exactly what it is. The autoloaders line up the shells in a ring around the cupola, and a lot of the MLAW type stuff the Ukrainians are using strike the tanks from above, where they are more vulnerable, too. Ignite the shells in the turret and it blows right off.
Historically Russian tank design seems to have favoured smaller tanks, which made sense when the main threat to a tank was another tank - harder to spot and harder to hit. The preference for autoloaders over manual loading is part of this. It seems that this design preference is quite disadvantaged in the era of smart weapons.
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I went down a Twitter hole that had a schematic of the tank overlaid with video of the Azov brigade videos targeting the tracks and a very specific space to the right rear of the tank that suggested exactly that. The turrets jump around as they run on a big bearing effectively held in place only by their own weight. When ammo goes boom it pops off.
I think partly superb intelligence aided by EU and US but also skilful use of drones and ground reconaissance. Also probably helps to have civilians with phones too.
Those photos of Russian tanks with turrets popped off and barrels nailed into the ground are crazy. Not something I'd expect to see in 2022.