If the US cuts off Russia from SWIFT, Putin has stated that it would mean war. I'm no military expert but my older brother who's an officer told me that he worries that Russia would immediately start cutting undersea cables that carry data across the Atlantic Ocean and basically cut off the US from Europe. That would cause billions of dollars worth of damage to Western economies every single day.

They already sent a message [1].

https://www.thedrive.com/the-war-zone/43828/undersea-cable-c...