[bubblethink]

It seems like they are still active, although not quite as much. The stickied post on that sub says so at least. The main draw for galliumos is support for odd devices for which upstream support is lacking. That's kind of why it exists, and I don't think things have changed materially for a lot of these old devices. Going forward, things should be a bit better since chromeOS itself tracks LTS kernel releases now, and I think they also plan to do kernel upgrades over the life of a device.