@xlurkr Yes exactly right, I'm using Simplex Technologies' Hubitat Elevation nodeserver v0.1.32 running on Polyglot 2.0 to link a Hubitat C7 to my ISY994i. The C7/Hubitat nodeserver/ISY combination has been reliable for the last year and a half, since I first got the C7. So I'm very happy with this setup for now.
One of the nice things about the Hubitat is the ability to create virtual devices, and map those to the ISY. This is useful when you have a device on the Hubitat that's not directly recognized by the nodesever. You simply define a virtual device on the Hubitat, map the actual device in the Hubitat to the virtual one using a script, and the virtual device will be available on the ISY. Case study: Before the Insteon Mini Remotes were available again recently, I needed a wireless Decora switch and the only available alternative was a Zooz ZEN34 which is a ZWave device (and BTW 1/2 the price of an Insteon Mini Remote). However the ZEN34 wasn't a device recognized by the nodeserver. Using the above technique I was able to include the ZEN34 as a scene controller in the ISY. This particular scene includes an Insteon 2477S (new style w/ 2 LEDs), an Insteon 8 button keypad, a Sonoff WiFi plugin switch (flashed with Tasmota and mapped to the ISY via the MQTT nodeserver), and the ZEN34. I can control the lights using any of those four devices and it's very reliable.
@Riggins44 I'm not using an EISY which as I understand only supports Polyglot 3x, so if the Hubitat nodeserver is not available in a Polyglot 3x version then sadly you're SOL unless and until the Hubitat nodeserver gets ported to that newer, non-compatible version of Polyglot.