Happened to read recently in this thread the feature set of Z-Wave 500 series (Z-Wave Plus) Zwave and zwave plus and was surprised to see that Network Wide Inclusion didn't become a standard feature until the 700 series. So it would be necessary to pair some devices (even newer Z-Wave Plus ones) within radio range of the hub depending on their feature set (not all, but you'd need to probe the specs to know).
I've always been puzzled why inclusion of the Z-Wave Plus repeater in the Iris V2 Plug fails unless done very close to the hub. Likely it doesn't use NWI. This is significant since it can effectively bork NWI for the mesh when used as a Z-Wave extender (it won't repeat NWI frames). Could explain a lot of 'fails to pair in place' issues even with the Z-Wave Plus devices that do support his feature.
