It seems, according to Grady, that all Abrams tanks that hadn't succumbed to difficult conditions on the ground were quietly withdrawn from the frontline and maybe even back to the EU. That's why during the last two weeks they ceased to pop up in the newsfeeds of Russian propaganda outlets.
Soviet-era classics has been proven more reliable during months of winter and rasputitsa. Moreover, Abrams and Challengers simply can’t be quickly reshaped into Tsar Mangals as a haphazard form of protection against drones.