Steven, please don’t forget about the advantages of one or two additional hubs. It increases the comfort, continuity and reliability of the smart home (yes, all hubs tend to error every once in a while, including Homey)
I mean, what power do they use?
When something goes south or breaks down, you can still operate a part of your iot stuff.
A Dirigera should use less than 4W (= ~35kW/Y)
_
Yes, go for zigbee2mqtt or HA + zigbee2mqtt add-on; Just allow devices to pair, and put all devices into pair mode, get yourself a coffee and wait until all’s set and done.
And it’s rock solid as well. And allows for fw updates, direct associations. And it can bind buttons to several devices: in case of z2m outage, it still works.
But, you also answered it yourself:
From reading posts about Hue:
I’d be surprised if it works differently with the Ikea hub);
you only need to know for sure.
Maybe Athom (the app creator) can tell?