If Ukraine can fly drones to Moscow that is an indictment of Russian air defense. Air defense in Russia could easily be as bad as Russian tactics and equipment. There is a partisan movement going on in Russia. Fires are being torched all over Russia. An air force base was attacked with fire bombs and two Migs were burned. This is on film. Recruitment offices are being attacked. Partisans may have launched the drones from inside Russia. The Ukrainians are putting up a good fight and depleting the Russian military. It will take Russia at least a decade to rebuild their army. I define winning by the occupation of land. A greatly diminished Russia is going to win either by negotiation or brute force. Attrition is the enemy of Ukraine and Ukraine will run out of men long before Russia will.