The weak link for people wanting to use digital money which is not of the CBDC variety remains that initial buy of cryptocurrency using fiat money tied to a bank account. For many of us here, we've already done that.
For people who have not done that prior to the CBDC going online, that's a problem due to KYC and AML laws. What these people will need is a newly-created and fungible medium of currency to be used as a buffer between the CBDC and the money they truly want to use.
Maybe we should see what the imaginative people involved in the "intoxicant" business come up with as a way for them to continue plying their trade.
Crypto adoption levels are already sufficient for person to person transactions to distribute crypto to the the 85% who don't already have it without any need for on-ramps. Merchants can start accepting crypto for goods and services and acquire it that way.
Mass adoption of crypto could occur in a matter of weeks and governments couldn't do anything to stop it.