comment: >
  
  I thought Poland already gave some tanks to Ukraine?
context: What about all the other russian tanks that were provided? seems they can fight other russian tanks just fine? >
  
  Key words being "fighting Russian tanks".  
  NATO and Soviet designs weren't made with the intent of fighting vehicles similar to themselves.  NATO nations designed their vehicles with the intent of fighting Soviet designs, and the Soviets designed theirs to fight NATO's.  
  While other nations have already supplied vehicles to Ukraine, they were ones that were either unchanged Soviet designs or were upgraded variants.  
  The AMX-10RC is a wholly NATO design, as it was from France, who was a nation who never had Soviet designs in their arsenal that needed to be upgraded or replaced.  
  Similarly, while Soviet vehicles can easily fight ones of their own design, the war in Ukraine emphasized some critical design flaws, including some that Ukraine almost certainly wants to get away from.  Most notably being the ammo stowage for the autoloader on the T-72/T-90 and T-64/T-80 designs.  Where NATO nations store ammo in a separate compartment with failsafes such as a blast door and blowout panels to protect the crew in the fighting compartment should the primary stowage is hit and the the ammunition detonates, the Soviet designs instead placed the ammuntion in a carousel encasing the turret basket, meaning the tank's commander and gunner are surrounded by the ammunition.  As a result, the crew are screwed in the event the ammunition detonates, and the vehicle will be a total loss, as you can see from wrecks in Ukraine, ones where the turrets are sent flying from the force caused by ammunition detonation.  
  In addition, Soviet designs are apparently very maintenance heavy, and actual Russian produced vehicles have been revealed to have severe quality issues.  The maintenance part in particular has come back to haunt Russian forces, as a lack of maintenance for decades resulted in much of their armored forces breaking down, both prior to combat and being abandoned once in or near it.  NATO designs, in contrast, don't have the quality issue and have been kept maintained even if the vehicles were sitting in warehouses.  And as an added bonus, having NATO hardware can help easing into NATO standardization when Ukraine begins to attempt to join NATO, thanks to the Russian invasion. >
  
  
  The AMX-10RC is a wholly NATO design, as it was from France, who was a nation who never had Soviet designs in their arsenal that needed to be upgraded or replaced. 
  
  Fun fact, the main gun on the AMX10RC is not NATO compliant. >
  
  To be fair though, "not NATO complaint" was kinda France's thing for a little while.  
  glares at the continued use of 7.5mm French and the MAS-49/56 rifles until the adoption of the FAMAS. >
  
  "France copies nobody, and nobody copies the French". >
  
  Kind of funny because people absolutely copy the French. They pioneered the turreted design of the tank, which was widely copied and licensed, and they invented smokeless gunpowder. >
  
  What is zis "tank" you speak of, monsieur? Un vehicule militaire armuree is a "Char". >
  
  I’m not going to pretend to have the faintest grasp of the French language, but I do like it.