AI has plenty of use cases. Just ChatGPT alone is helping me everyday in many different ways. I don't think it's remotely comparable.
Government were never going to allow some unfettered parallel monetary system. Governments invested a lot of political capital to monitor and control monetary flows (from reasons/excuses like fraud, terrorist financing, money laundering). No way there were gonna relinquish that power.
They might use the technology itself as CBDC, but that is about it.
It was sold as new web 4.0 or whatever. NFTs were the future. Smart contracts.... And all it seemed to deliver were all mistakes and scams monetary system made in 19th century.
CBDCs are the absolute antithesis of cryptocurrencies.
What "existing adoption" are you talking about? In 15 years I've seen only speculation and a grand total of zero products used day-to-day by average people.
The fact you lump all these things together is a perfect illustration. Most blockchain and cryptocurrencies proponents understand nothing about technology.