bobchap

But if I want to take advantage of 5.1.0 (and beyond) fixes and features, then I must upgrade to 500 series hardware? Sent from my SM-G965U using Tapatalk

I'm not sure I understand. Does #3 mean "you don't have to upgrade your ISY software" or "you don't have to upgrade your Z-Wave hardware, but can continue on the 5.x.x soutware upgrade path?" Sent from my SM-G965U using Tapatalk

I think the real issue closing off a released 5.x to long time users of 4.x.

Forgive me, but what does that even mean?

I hadn't thought specifically about backup, but restore device could be a problem. Don't think I'll try it. Thanks. Sent from my SM-N910V using Tapatalk

ISY versions 4.3.26 & 5.0.4 -- Conventional wisdom says only one ISY should control any given device. Can the other ISY, however, successfully monitor such a "shared" device (e.g., checking on/off status)? Is there any danger of links getting confused? Thanks in advance, bobchap