IKEA ditches Zigbee for Thread going all in on Matter smart homes

I've found Matter totally confusing. Given a device that supports Matter (e.g., a smart plug) and a set of devices I want to control that from (e.g., an Amazon Echo and an iPad) it is not clear to me what else I need.

Apparently I need a "controller", which is not necessarily the thing that I as a user would think of the controller--as a user I think of the controller as the device I issue command from. A Matter controller is apparently a hub for connecting the thing I'm using to issue commands to the IOT device I want to control.

And maybe I need a "Thread border router"?

As far as the controller goes, apparently at some point Apple added the ability for iPads to be Matter controllers, so you could use a Matter device with just an iPad (if the Matter device used WiFi...if it used Thread then you would need a separate Matter controller and I'd guess one of those Thread border routers).

I was able to briefly use a Matter smart plug with my iPad without having a separate hub, but it stopped working not too long after. I deleted the plug from the iPad and did a factory reset on the plug and tried setting up again, but now when the iPad searches for the device during setup it doesn't even see it.

Apple still has instructions on their site for setting up devices for direct use from iPad, but several sites on the net report that they actually dropped that support from iPad.

So lets say I go get an actual Matter hub. Do I need a separate hubs for using my Matter devices from my Apple devices and using my Matter devices from my Amazon devices? How about if I need a Thread border router--will I need one for Apple and one for Amazon? What if I add Home Assistant later--am I going to need a third hub?

All I'm really trying to do for now is use this one TP-Link Tapo smart plug that supports Matter from Apple Shortcuts without having to use the Tapo app. The Tapo app does integrate with Shortcuts but you have to be logged in to your TP-Link account on the app for it to work. Every so often you have to re-login, breaking your shortcuts until you do.

What I'm currently considering is installing Home Assistant somewhere, probably in a VM on my Mac for now but latter on a dedicated RPi if the experiments in a VM show that it will work, and setting it up to be my Matter controller for the smart plug. Shortcuts (or Siri) won't be able to directly use Matter to control the plug with that setup, but there is a Home Assistant app for iOS/iPadOS that can do so and that supports Shortcuts.

It will basically be like I'm doing now with the Tapo app but instead with the Home Assistant app and no need to be logged in to TP-Link (or to even have internet access).

PS: I wouldn't need any of this if Apple would just get around to implementing for iPadOS the same 80% charge limit option that they have had on iOS for ages. I'm using the smart plug and Shortcuts as a kludge while waiting for that. I charge through the smart plug and have a Shortcut automation to turn off the smart plug when the iPad's battery level rises above 80%.

If you want to participate as more than a hobbyist, you'll need to join the CSA (a non-profit mutual-benefit corporation). This will cost a bit less than half of what it cost manufacturers to join the equivalent organization for Z-Wave — a closed, single-vendor, non-IP-based solution that was state-of-the-art 25 years ago.

Money paid by commercial vendors funds stuff like test labs, interop events, and compliance support systems.

Thank you for the clarification?