This was funny! Thank you all for a good laugh!
Sorry for an unprecise question! 
I was thinking about the stability of the zigbee (and to some extent z-wave) network
Some of my, mostly zigbee devices, loose connection from time to time. The loss of connection is random and there is no pattern that I can see. To improve this situation I have tried to make sure that there are enough nodes for the network to connect to and not to many connections directly to the hub. I have also checked that WI-FI, Zigbee and Z-Wave interferes as little as posible and so on.
I have also turned off the hub to get the nodes to rearrange and find each other in a more optimal way, but they dont seem to want that. In my zigbee network (pictured below, sorry for the swedish node names) the connections seem to be pretty random and not governed by proximity. A, B and C are very close by geographically but not connected. Same with G, H, I and J. Does that matter? Is it worth persuing? And if so how?
E and F are not supported Namron under floor heating thermostats and they seem to have a double conenction for some reason. K is a thrid namron under floor heating thermostat but without a double connection. One of them (E) frequently looses connection even though it is close by several other nodes.
I also have curtain motors that work perfectly 98% of the time but sometimes loose their connection. But they are connected through Home Assistant so they might have issues unrelated to HE.
All metioned have about 95% up time. Maybe that is what is to be expected? Not worth / possible persuing 100% up time?
Any thoughts?
