I always believe that its a bad idea for central banks to issue their own digital currencies. An inclusive trusted digital currency like DNotes will best serve to supplement fiat currencies, not replace them. Fiat and digital currencies can efficiently co-exist in the digital age. Regulations will just have to catch up.
There are huge operational consequences for central banks in implementing monetary policy and implications for the stability of the financial system. Central banks do not put a brake on innovations just for the sake of it. But neither should they speed ahead disregarding all traffic conditions.