Russia can barely hold on despite Nato/EU only giving aid in the form of weapons/supplies. The current Ukraine/Russia war has only exposed just how hollow a superpower Russia is, and I wont be surprised if China is found out to be the same.
Huh, Russia is currently defeating the military industrial complex of NATO and from the entire NATO real time reconnaissance from Awacs and sattelites.
It will take years for NATO MIC to match Russia current production capacity. Nato has been scraping artillery supplies from South korea and even India.
The only area where Russia are behind is aircraft numbers. But if NATO is directly involved with air power. Those NATO bases and factories producing aircrafts in Nato countries will be bombed by Russia and with nukes if things really look dire.
Even if the Nato airforce is directly involved like in Yugoslavia, the serbs took down stealth aircrafts with pre historic AA weapons and at that time Russia was not in a position to help serbs.
The cost Russia can inflict on Nato aircrafts from ground based mobile AA will be devastating.
All the so called game changer western weapons Patriot, IRIST, Himars, Javelin, JASSM, M1A1, M2A2, Lepoards, Challenger, have been destroyed or made them irrelevant by Russia.
The moment a F16 or mirage 2000 or a Typhoon climbs to 1000ft or above, there will be a missile heading towards them. To launch a stand off missile at meaningfull distances, the aircraft needs to be really fly high, higher then a airline. Russia still has the world's largest AA defenses that has become stronger with latest variant of missiles and software algorithms from the lessons learnt with facing off Nato weapons.