I think this shouldn't be the basis for that. Here in our country, there are still a lot of places that don't have a stable electricity where a lot of brownouts are happening. In case of literacy, since milennials are getting older whose generation are used to technologies, I guess we don't have a problem with it. Still, that would take years or maybe a decade.
With many countries still behind others in terms of adopting the latest technologies, digital currency payments' growth will stifle. For governments to be able to roll out their CBDC solutions, there needs to be widespread Internet access all over the world. And that could take decades to happen. Not to mention, physical cash needs to be phased out from existence at a slow and steady pace.
For what I know, it's not a priority to transition from physical to digital cash. Of course, there are added benefits such as faster transaction processing times and higher efficiency to banks using CBDCs. But physical cash can still do well in a digital economy dominated by crypto and credit card providers. No matter how far crypto reaches in terms of mainstream adoption, it'll never be able to compete with banks directly. That's largely because banks dominate the world's economy. They essentially control the supply/issuance of national currencies. Adopting a CBDC now or later will not make any difference at all. Instead, the average person will be able to conduct transactions digitally (instead of physically). But the rest will remain likely the same. Ultimately, physical cash will become history as the world enters a new era where intangibility is put above everything else. It could take decades, or in worse-case scenarios, another century before everything shifts to the digital realm. At least, we'll be able to continue using physical cash during our lifetimes. Just my opinion