I would have thought that Zigbee had zero traction some years ago. But since then Hue (and Lightify and other Zigbee LightLink solutions) popped up and now are

I would have thought that Zigbee had zero traction some years ago. But since then Hue (and Lightify and other Zigbee LightLink solutions) popped up and now are probably the most sold personal home automation things around. The manufacturers do want for sure to push the ecosystem and are announcing more products based on it. Compared to that Thread has next to zero available devices (don't know whether Nest uses it). So I think currently it's a bit too soon to talk of ZigBee being deprecated.