Technical standards become real only when independent implementations interpret the same words closely enough to exchange data, preserve behavior, and pass interoperability tests.
IPv6 redesigned the Internet Protocol around 128-bit addresses, simplified base headers and extensibility, but its history became equally defined by the difficult coexistence and migration from IPv4.
QUIC moved secure connection setup, multiplexed streams and modern congestion control into an encrypted transport above UDP, giving HTTP/3 a way around several limitations of HTTP over TCP.