This shit might dangerously soon be enough for Putin to just say "yolo". Also, insane how the entire world is quickly responding to Russia, while noone gave a shit about the US killing literally millions of people. Or the Saudis killing more innocent people right this moment than Russia is. And they will be allowed to continue to do so. It looks like the US hegemony is getting only stronger, not weaker, no matter what it does.
Sure, contradictions rising.
The point is that utilising a secondary system, especially in a system like bank telecommunications where they're essentially fungible commodity backends, is something that is no more sanctionable than choosing adidas vs nike for your olympic team's sportswear. Doubly so since it's perfectly possible to get both the adidas ones and the nike ones and hold onto one set just in case there's an issue with the first. It's not a pick one or the other system. You can implement both, and just flip a switch. Like having two SIM cards in your phone, and switching between them if service drops on one.