The tank shuts off, a repair vehicle can follow in and take care of it. These ideas were thought up by DARPA back in the 1990's. There simply was not a priority since back then Russia was a joke and the focus since 9/11 has been on fighting a person who survives for months in caves and his only logistics are a $2 shawl, $4 clothing, $.2 plastic water bottle he reuses, a $50 dollar knockoff AK and the same in ammunition.And who is going to take care of the tank if its stuck or a tracked wheel comes off? Who is going to maintain it in the field?
Even with this focus, we still maintain COMPLETE superiority in ANY 1 on 1 conventional conflict with ANY foe in the world.