SWIFT was created in order that Europe may resist Kissingers increasingly capricious hand of soft power as it emerged as a lead sap in an increasingly arbitrary US foreign policy. 40 years ago the US had become effectively drunk on soft-power moves against states it perceived as even remotely objective to US interests. Is your president elect too socialist? you get an aircraft carrier floating in your strait for a year. did you nationalize your oil fields? sanctions mean you cant sell it to anyone. Cuba to this day still enjoys endless sanctions for resisting regime change.
in 2022 sanctions are to international diplomacy as a tantrum is to a toddler. theyre effectively meaningless as most capable, observant countries have managed to sidestep in part or in whole the once dominant US hegemony of finance and trade. even the threat of a blue-water naval presence is an unspeakable taboo as Russia is one of a handful of emerging countries you wouldnt dare send an aircraft carrier to patrol, unless its goal was to secure the ocean floor.
The only meaningful threat SWIFT offers is the ability to assuage short-term market fears among traders that dont fully understand just how inapplicable SWIFT is in this case.