UPS has already dropped the new unit, so I plugged it in while eating lunch to see if the Nanoleaf bulbs I had previously used via bluetooth would change themselves without having to be reset. I disconnected my old unit so that it wouldn't stick to bluetooth connections. I followed the thread network tab in the Eve application, and the bulbs slowly migrated from bluetooth to thread in 10-15 minutes. At one point, I started to turn them on / off and it was obvious what had changed, because the wired bulbs were almost instantaneous and the Bluetooth had a normal delay of 3-5 seconds. I manually turned off the power to the bulbs once (with the physical switch), because it seemed that the last one was blocked by changing. He joined the wire network shortly after. I only have 5 wired bulbs at the moment and they are all pretty close to the new AppleTV, so they are all listed as routers. I might try to move one out to see if I can get the different names from the Eve app. All in all, the whole transition was pretty painless. It probably would have ended on its own if I hadn't touched it, but I think the few things I did helped speed up the process.