This doesn't answer the question as to when we might see the Matter integration, but I have started adding Thread devices to my house using Apple TV's as the Thread Border Routers. I will be using the Apple TV's as my cable TV box as I phase out the physical boxes from Spectrum. This means the Apple TV's are spread around the house setting up a large Thread mesh network. I bought 3 Eve Energy plugs which are routers themselves and added them to the Thread mesh. With that , I already have the Thread network running and am getting some experience with it. I used the Eve Home app to add the switches and that app gives you a really good map of the thread network. I can control the devices via the Eve Home app or HomeKit. They automatically show up in both. I'm hoping that when Matter integration is added to Eisy, it should see the existing Thread network and allow me to include the Eve Energy switches in my Eisy programming. The switches are very fast, much like Insteon and much faster than Z-Wave. So far, I'm pleased with the quality of the Eve Home switches and the ease of setting up the Matter/Thread system.