After continuous unmitigated disaster that is IoT, there are still people out there that say "we want more of that in our lives"?
I've worked with supporting commercial-grade embedded systems that would now fall under the 'IoT' banner now, predominantly things like HVAC controls and other energy management stuff.
I categorically would not use something from Apple in my house, simply because my appliances are on a much longer lifecycle than anything Apple produces or supports. I'm not going to put in a system that Apple might provide all of five years of support and updates for to interface with systems that have a reasonable service-life of 20 years.
It's already problematic enough with many commercial-grade control systems falling behind the curve on things like WiFi protocol, don't get me started on the number of new products that are still only 802.11b/g/n compatible, but at least most of those devices also still support twisted-pair Ethernet. I would be astounded if Apple or Android products intended as embedded IoT systems even do Ethernet anymore.
Compared with the Lifespan of an Enterprise-Level Building Control Protocol/Ecosystem, something like Echelon's LON, Apple's Foundational commitment and contributions to the fledgling Matter Protocol and Thread Radio MESH, bodes well for this new Consumer HA Standard. With over 697 Industry Commitments, and new, Cross-Platform-Compatible Peripherals being added every day, take it from someone who's been playing with this since the late 1970s, Matter has the feel of a Standard with some Staying-Power. Closer to 20 years than five, IMHO.
And for home use, a dedicated Home Hub, with the bitchin' noise-cancelling, multi-microphone array like the Home Pod for voice commands from anywhere in the room, and an iPad-mini-like Display for Home Control would be wonderful. I've been doing some of this for a couple of years with my AppleTV box as the Home Hub, and I'm here to tell you, a Dedicated I/O Device would be MUCH nicer, I think!