After nearly 6 years since R1/alpha4, Haiku R1/beta1 has been released. [haiku-os.org]
...
This release sees the addition of official x86_64 images, alongside the existing x86 32-bit ones.
...
By far the largest change in this release is the addition of a complete package management system.
I'm very happy to see the progress alternative open source operating systems have made in recent years.