The Vistula-Oder offensive of January 1945 saw the Red Army advance 300 miles across Poland and East Germany in two weeks. Over 2,203,600 Red Army personnel were committed to the operation. For the ensuing Berlin Strategic Offensive Operation, 2,300,000 Red Army personnel were committed, including 6,250 tanks and self-propelled guns, 7,000 aircraft, and 41,600 artillery pieces. The Red Army in 1945 had excellent logistics and extensive combat experience.

'Pushing on' to Moscow would have required committing enormous numbers of Allied men and material to potentially years and years of future war against a Red Army that was ostensibly at the height of its power. That's assuming that large numbers of Allied personnel wouldn't have mutinied en masse at the news of a sudden outbreak of new war against current allies when the war was considered over.