I'm reading this discussion, and allow me to give you my two cents. It's not a matter of being impossible, but rather how much the rest of society is willing to pay to maintain such infrastructure (either through higher taxes when dealing with the government, or through more expensive goods/services when dealing with corporations, since companies need to maintain old infrastructure that most people don't use).

For example, I read that Switzerland voted to guarantee the use of physical cash, even enshrining it in the constitution, which clearly points toward preserving older infrastructure. However, if you have cash but no one accepts it, it becomes useless. So it would probably require more—something like requiring businesses and the government to accept that form of payment.

As many things in life, not impossible: but is society willing to pay for that?