Let's hope they rebuild it all from the ground up.
I've just had a nightmare week getting my Hue setup to play with HomeKit.
I primarily use Alexa, but she's inside and want control of my lights from my Apple Watch when I'm in my garden/swim spa. The Home app could see my Hue Bridges, and then one of them vanished, and I couldn't see it for several hours, and then it popped up again. Now it's all connected, it works, but you can only individually copy (not sync) scenes to it from the Hue app and that feels so unnecessarily gimped, slow and unintuitive, and I can't help but think it's down to the "sandbox" limitations of iOS and iPadOS.
They stick their fingers into a pie, get everyone to buy into it, abandon it half-baked (Siri, anyone?), and move on to their next big thing. It's actually depressing.