Or, to put it more directly: do digital forms of payment that contain traces of individual data generate social costs that need to be accounted for in future cost comparisons? 2/4  BIS central bankers' speeches  It is obviously hard to disentangle supply and demand-side drivers in economics. Moreover, both drivers are likely to be mutually reinforcing.
But to the extent that declining cash usage is driven by supply-side adjustments, central banks can no longer remain neutral. With one side dominating, the coin becomes biased. Being neutral with regard to consumer choices does not imply being passive with regard to providing an adequate cash infrastructure.