I’m in the process of migrating from Zigbee (Z2M) to Matter over Thread (Apple HomePods + Matter Server). My Zigbee network was a mishmash of different vendors all of which had their own failure rates and quirks, Aqara having by far the highest failure rate and complexity. My new Ikea (Thread) based setup has had absolutely zero issues so far and fingers crossed it doesn’t start suffering as I scale it out. That said…
What's to stop Ikea from pushing an OTA and crippling your whole setup 2 years from now?
Most IoT stuff I own had a good track record. The only stuff that screwed me over was the logitech harmony smart remote.
But I usually pick the more open ecosystems and vendors. E.g.heating is on shelly.