I actually have a experience that is probably relevant. We have 2 homes (main and seasonal). For years I have run ISY/Insteon in our main home and have been generally quite happy. When we got the seasonal home I decided to go with Z-wave for the most part. My main concern was that Insteon was/is a single source and had seemed to go pretty dead regarding new products. So in the new house I have installed initially HomeSeer Z-wave and now Inovelli stuff. I run Home Assistant for the hub. In a bit of a back port, I also run HA now in my main home along side the ISY. That provides what I think is a much better/richer non-Insteon environment that does ISY’s Node Server stuff. From this experience some personal conclusions:
- With Zwave absolutely go Inovelli over HomeSeer. The latter have had a high death rate plus the Inovelli provide better function and customization.
- Go with Home Assistant for a hub. Very active community with very responsive folks to fix or help with issues. HA provides an excellent single platform for combining multiple technologies. I run zwave but also have IP devices, cloud only integrations (pool controller) etc. and have yet to see anything I couldn’t integrate on the platform.
- The easy path to begin conversion is to have HA install the ISY integration. That gives HA full view into your ISY environment and lets you start to automate stuff using HA that controls the Insteon devices while at the same time continuing to use your ISY programs. I have tended to add new automations of ISY/Insteon controlled stuff in HA simply because the HA programming/automation model is more straightforward than the ISY one (obviously in my opinion).
- Bottom line, you can ease your way into Zwave via this path and decide where you want to make the effort to retrofit.
Happy to answer any questions given my experience on both sides of this.