IPv6

I really hope you're right. I'm one of those people who believe that we should simply abolish IPv4 completely. We have zero need for IPv4 and dual-stack networks are way more prone to errors and complexity.

People usually say that IPv6 is hard and IPv6 addresses aren't "memorable" but that's mostly BS because with the :: aka "reduced format" they can be even simpler than IPv4. Others might say it is dangerous without understanding how NAT isn't necessary and how a firewall should work. Another common argument against deprecating IPv4 is that we should keep compatibility with older devices, to which I say... IPv6 support was introduced in Windows XP SP2 (2004).

IPv6 is great, largely simply networks, make things more efficient and allows for more complex scenarios that are hard to deal with in IPv4. Multihoming, advanced load balancing, network level split DNS, direct peer-to-peer communication, totally abolishing DHCP in a usable way etc.