We've been working with Valve on Holo Core, a pure aarch64 port of Arch Linux, built to run on Steam Frame. Arch has no official aarch64 support and no CI infra of its own, so we built both. First public preview (binaries, sources, containers) is out now!
@combuster @collabora running alarm for more than 10 years, my only hiccup was when they abandoned armhf support and i was forced to migrate all my pi1 to raspbian