I think it will be tight for other developers who wants to create new token or coins if every country decide to create their own crypto. This will definitely open a way to establish blockchain technology era but will kill the decentralized idea of it. Government will definitely oppose any crypto that is not regulated by the government and might end the era of decentralized crypto.
Many countries are moving towards a cashless economy, this started before Bitcoin was created, electronic payment systems and then Bitcoin/Blockchain happened. As the Blockchain ecosystem is evolving, more governments are studying it and a few think that Blockchain technology could be used to create a new digital financial system which would be more efficient and cheaper than the existing one. If I exaggerate, for governments Blockchain technology might be a catalyst to push their cashless society agenda, centralized cryptocurrencies.
With Bitcoin, not only Blockchain happened, but also the idea that decentralized money without governments can exist. Decentralized, security, privacy, trustless. With centralized cryptocurrencies, it would be the exact opposite. Two different terms, technology adoption and technology acceptance, might sound similar, but different. I guess most of the crypto users have adopted, not merely accepted Bitcoin/cryptos/Blockchain for the very reason, decentralized. If governments issue their own Blockchain-based cryptocurrencies, it would be accepted, might even be enforced to adopt. A whole new decentralized ecosystem is evolving, opposition from governments wouldn't simply end it.