To call what is happening now the classic Russian style of warfare is a flanderization of Soviet Second World War tactics. The Soviets were indeed attacking en masse, but they were not voluntarily sending people to a meat grinder with no hope of success. They instead were using their sheer numbers to annihilate the ability of the enemy to mount a defence. The fact that the Soviets are renown for not retreating was also due to their enemy losing the initiative.