But while symbolic, Kyiv falling doesn’t mean that much. The Russians can put 20k of skilled soldiers with armor and air superiority into the battle. But how does that many men “ hold” a city of 3 Million? And, while they are traveling through other areas and cities to get there, once they leave to go to Kyiv, unless they leave thousands of troops behind they don’t control that territory anymore. And they don’t have men to leave behind.
If we think of Ukraine as the size of Texas with 43M people, imagine trying to take and then hold Texas with 50k combat troops and 150k support troops. You could take Austin or DFW, but how can you hold it, manage your supplies, all the while taking casualties and having a population sniping at you around every corner.
So taking it can be done at a cost, but then keeping it is even harder, or you pull out and give it back to go to a new objective.