Zigbee Alliance renamed themselves to the CSA. Can companies still keep making Zigbee devices after Matter? Sure, it's not impossible, but it's not really going to happen much more than somebody producing anything else obsolete.
The fact of the matter is that Zigbee isn't competing with Matter, it's being replaced with Matter. Rebranding may not be the best choice of words, but I think you're missing the point.
The fact of the matter is that Zigbee isn't competing with Matter, it's being replaced with Matter. Rebranding may not be the best choice of words, but I think you're missing the point.