A hospital's MRI machine doesn't need an internet connection. IPv4 only intranets are fine and we are never going to get rid of them. But anything that connect

A hospital's MRI machine doesn't need an internet connection. IPv4 only intranets are fine and we are never going to get rid of them. But anything that connects to the internet needs to be updated regularly, if only for security and vulnerability reasons. If you have a 10-year-old functional and supported desktop, it most likely supports being IPv6 only just fine. The typical 10-year-old desktop came from the factory with Windows 8 and could be upgraded to Windows 10 (since it's supported). It even gets relatively new features such as IPv6 RDNSS allowing DHCP-less deployments.