You are replying to a thread which is three years old. They have been many discussion threads since that time about various replacements. In particular, see:
Or if you are looking for something that is specifically Zigbee, see:
Please don’t resurrect zombie threads (those which Have had no activity for more than a year) unless you have first searched the forum to see if there are more current threads on the same topic.
Otherwise other community members end up reading through dozens and dozens of posts which are very out of date.