Well we could argue that this support for trillions of IP addresses is nice, except that IPv6 does not technically work in interplanetary environments due to various hardcoded timeouts.
The first martians are likely to run their own local network and then use a VPN over DTN for their everyday communications by email (and appear coming from a single IPv6 address).
One good thing though: since most of the humanity’s knowledge is going to be packed in an LLM they won’t really actually need internet to learn about things. But lack of videos may be annoying.
I see only one IPv6 timeout, for fragmented packet reassembly, in other words between reception of fragments. So it's a bound on jitter not latency, and I see no reason it couldn't be increased for interplanetary links.
The first martians are likely to run their own local network and then use a VPN over DTN for their everyday communications by email (and appear coming from a single IPv6 address).
One good thing though: since most of the humanity’s knowledge is going to be packed in an LLM they won’t really actually need internet to learn about things. But lack of videos may be annoying.