The immediate reaction in the thread seems to be something like "what makes it a good alternative to Bitcoin" but it might be that it's aimed more as a competitor to the physical euro.

If the government knows when payments have been made, that eliminates potential for not reporting sales, which I understand is a significant issue in some EU members.

There's also some cost to handling (including security) and maintaining physical currency that doesn't exist with digital currency.

Here's an article arguing that the US -- which has apparently not shown much interest in a "digital dollar" -- should adopt something similar. The rationales it gives seem more aimed at it being an alternative to physical cash:

https://www.nytimes.com/2021/07/22/opinion/cash-digital-currency-central-bank.html

• One benefit is security. Cash is vulnerable to loss and theft, a problem for both individuals and businesses, whereas digital currencies are relatively secure. Electronic hacking does pose a risk, but one that can be managed with new technologies.

• Digital currencies also benefit the poor and the “unbanked.” It is hard to get a credit card if you don’t have much money, and banks charge fees for low-balance accounts that can make them prohibitively expensive. But a digital dollar would give everyone, including the poor, access to a digital payment system and a portal for basic banking services.

• A central-bank digital currency can also be a useful policy tool. Typically, if the Federal Reserve wants to stimulate consumption and investment, it can cut interest rates and make cheap credit available. But if the economy is cratering and the Fed has already cut the short-term interest rate it controls to near zero, its options are limited. If cash were replaced with a digital dollar, however, the Fed could impose a negative interest rate by gradually shrinking the electronic balances in everyone’s digital currency accounts, creating an incentive for consumers to spend and for companies to invest.

That one might not be too popular with users.

• A digital dollar would also hinder illegal activities that rely on anonymous cash transactions, such as drug dealing, money laundering and terrorism financing. It would bring “off the books” economic activity out of the shadows and into the formal economy, increasing tax revenues.