Again, please tell me what Russia has that the world cant live without?
I think correct question is another one. What the (western) world can offer, really life critical, that Russia will be unable to replace by domestic made or third party sourced functional equivalent in 2 years or so? Especially if there will be moratorium to legal protection of patents for products and technologies that is not commercially offered to Russia due to sanctions or strict forms of export control (a sort of mandatory licensing like now done with songs for use in broadcasting - right owners get centralized payments from special fund proportional to frequency of use).
Russia is netto exporter of food now, so will not starve for sure. Customers that need luxury cars probably out of luck, but nobody cares here about its problems.
Without being an accepted member of SWIFT Russia doesn't get paid in Dollars or Euros ...
TELEX still works and can be used with direct bank to bank links. Plus couple of working days to process, but it still working. Dollars, Euro or Cauri, doesn't matter... And there is national payment system with some foreign correspondent banks already connected.
So, SWIFT is not a wunderwaffe at all. ;)
free and independent Ukraine didn't appear until past 1989.
Now tell me how Lenin was able to hand Donbas and Novorossia to Ukrainian Republic, if there was no Ukraine before 1989? ;)
Learn it! In 1922, young Ukraine joined the Union of Soviet Socialist Republics without Kharkov, without Kherson, without Odessa and Donetsk, without Lugansk, and, of course, without Crimea. Ukraine did not even have Lvov at that time.