Interesting. I feel I have maxed out at about 45 Zwave devices at this point, they are mainly in-wall dimmers everywhere, and a few outlets. Everything I have added for the last couple years has been Zigbee, so I don't see myself getting into tortured route territory with Zwave. Good to know, though.
I have one zwave outlet that does power reporting, all the in-wall dimmers are pretty network quiet.