The Russians had “the logistical capacity” to take Berlin in 1945.
That wasn't Russia, that was the Soviet Union (which included Ukraine) 80 years ago, and that was with the United States helping the Soviets out MASSIVELY with logistics. Just as one example, the US gave the Soviets via lend-lease 420,000+ trucks, 2000 locomotives, 10,000 railcars and 4.5 million tons of food among many other types of aid. That's not a typo, you read that right, we shipped four hundred and twenty thousand trucks to the Soviet Union. If the Russians had that kind of logistical support today things would be very different for them. And if they hadn't have that logistical support in WWII from lend-lease, they would have lost the war.