[Mashiro]

FYI: IPv6 is backwards compatible to IPv4 although not at the very best level in terms of network performance and setup, but it is compatible. It's called IPv4-in-IPv6. IPv4 addresses can be carried within a IPv6 address like 0:0:0:0:0:ffff:808:808 (example from https://www.ultratools.com/tools/ipv4toipv6). And it is done in real world use cases (of course with other prefixes than in the example). What is a real use case? DNS64 and NAT64 for example. This allows a IPv6 only machine to access IPv4 content easily by simply using DNS servers that are setup with DNS64 and NAT64.

https://tools.ietf.org/html/rfc6147
https://tools.ietf.org/html/rfc6146
https://en.wikipedia.org/wiki/NAT64
https://en.wikipedia.org/wiki/IPv6_trans...nism#DNS64

I used to do this with a lot of these IPv6 only free VPSs.