What do you think will really change after that? If a country reduce the cash by 70% and let the 30% available for rural areas since they likely don't have access to the internet and allow the rest to go digital, will there be difference between what cash is doing? I don't think so, inflation will remain the same because the supply of money will remain but this will allow the country to be able to track money easily and also block some.
This is really interesting, because when the state makes it possible and easy to track money because its use has been reduced, that's when there will be slight changes in each region that implements this. Because this can also be said to be a form of fighting the current inflation so that rural residents will also be more accustomed to it in the future.
The only benefit of going digital is that the central bank will not spend money on printing again but even if they stop funding printing of money, that money will go to improvement of digital payments and frequent update to make the cashless to be faster, clean and easy for everyone to use.
Well, this could also be a very good option although I'm not sure central banks will stop printing money because they already support digital payments in any form. Because the banks also don't want to lose because of the presence of digitalization in society, the banks will definitely continue to do the old things that can make them profitable like before.