This is also in the interests of all EU central banks as one day the Central Bank of Montenegro will join the European System of Central Banks and, at that time, will need to meet all relevant standards and be able to function properly within the system.
Otmar Issing once coined that quite succinctly - “one size must fit all!” The member states had to accept that fact when they joined the third stage of European economic and monetary union. If persistent diverging trends emerge, either they have to be accepted, or, if detrimental economic consequences result, measures need to be taken at the national level.