The writing is on the wall; barring some sort of major social upheaval, cashless will be more dominant in the future. That doesn't matter. If laws mandate that

The writing is on the wall; barring some sort of major social upheaval, cashless will be more dominant in the future. That doesn't matter. If laws mandate that services must take cash then a cashless society is impossible, so people who choose not to go cashless can't be forced to give up cash. Hence the war on cash has been won, and cashless lost.