This release the artwork is based on the stories of Douglas Adams, including his favorite number — 42. Therefore we can remember the previous major achievement of CSRG — BSD 4.2.
BSD 4.2 was not free, but it created and integrated so many new technologies that we all depend on today. Take a moment to consider how many things first available in BSD 4.2 you are using at this moment, to read this page — sockets, AF_INET, virtual memory, etc.
Today, new releases of operating systems from well-known vendors contain less new features than BSD 4.2 did.
If only we could stop slacking and make a release like that!