I am currently experimenting using a Hubitat Elevation (HE) as a Zigbee Controller at the moment. I have two Zigbee networks running: My cc2531 (Zigbee2MQTT) and HE.
The experience I had when the CC2531 went pear-shaped over Christmas and a level of complexity involved with setting up Zigbee2MQTT is what made me interested in Hubitat as it seems easier (even if more expensive).
As mentioned, the setup in HE seems easier but you do have to install some 3rd party specific Zigbee Device drivers. I have got MQTT to work and the HE devices are reflected in Indigo via Joe’s MQTT Shims plugin.
Out of interest, @Busta999 has discovered that Hue Motion Detectors will still output temperature updates if they are put inside a fridge or freezer. My fridge is currently registering 4.74C and the freezer is registering -18.2C. It will be interesting to see how long the batteries last.
More work to do on HE but it looks promising.