Javelin: top attack, fire and forget, 4km range. What’s not to like.
NATO tanks have no defense against them. Russian tanks have Arena active missile defense that has a good chance of dealing with it and saving the tank.
Recent performance of Russian antitank missiles have shown that they weren’t kidding about their capability (ask the dead Turkish Leopard 2 crews that the Konkurs is decimating) and the Chechens (those who survived the counterfire) can testify about the effectiveness of Arena.
Oh, and guess where some of those Javelins will inevitably end up. Hint: Used against NATO vehicles.