I think we can all agree that cryptos are here to stay and only the form and applications are yet to be determined.

Has any one considered the threat to independent cryptos that a gov't or central bank issued crypto represents?
A crypto tethered to the US dollar could gain rapid widespread acceptance by banks and business entities making it possible to buy anything from a soda to a car in crypto. Debit card readers could quickly be converted. bank account balances could be held in dollars or cryptos etc.

While we might get the benefits of electronic payments that come with a digital currency, we would completely lose the protection from the manipulated value (or devaluation) of the dollar. That won't stop the banks from doing it. In fact it's an incentive for the banks to do it. Their tethered crypto could get widespread usage in a couple of years and make it very difficult for non tethered cryptos to gain acceptance.  Widespread business acceptance of a crypto will lead to widespread acceptance by the non technical general public that don't understand the difference.