Main reason is also to stabelize a large zigbee network, like having a lot of troubles with the homey to keep stable over time when having +60 zigbee devices in one network… so adding the hub makes it stable… (proven) but disconnected from the single controller…
so i moved now almost all ikey lights that are controlled by simple buttons and/or time based or motion detectors to the hub and using google nest hub to control them… as homey can not…