Highly disagree that Z-Wave is dead. There are many companies, especially Zooz, coming out with new products all the time. Yes, ZigBee is far cheaper but I’ve had the worst reliability issues with ZigBee and moved everything to Z-Wave. Zero issues with connectivity or batteries dying too fast.
But that’s the beauty and strength of HA. Openess and selection.
Thanks for mentioning GalliumOS! I’ll be putting that on my SO’s old Chromebook now.