The reason it won’t be a Thread Border Router is because the SmartThings WiFi Hub mesh does not have a Thread radio. Anything that has a Wi-Fi radio + a Thread radio can theoretically become a Thread Border Router. See the diagram below. Because of these very minimal requirements, over time, Thread Border Routers will ship in much smaller, less expensive devices, primarily in devices on mains (e.g., constant) power.
The point is that your article is
not accurate Thread Border Routers (TBRs) require the internet.
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A Thread Border Router is only for Thread devices and it only connects a Thread network to a Wi-Fi network. It’s not related to Matter Bridges, which are primarily for Z-Wave & Zigbee networks.
More simply,
Z-Wave, Zigbee, Wi-Fi: these require a central “hub” or “access point”; all devices end up connecting to this central point, whether it’s a Z-Wave Hub, a Zigbee Hub, or a Wi-Fi access point (aka a Wi-Fi router).
Thread: Thread devices don’t connect to any hubs or access points. Thread devices only connect to other Thread devices. So they create a Thread network. So how does a phone or a computer or any non-Thread device talk to the Thread network? The Thread network needs to have a Thread Border Router (which has both a Thread radio + a Wi-Fi radio); the TBR then connects all Thread devices to your local LAN (Wi-Fi & Ethernet). Now anything on your local home Wi-Fi or Ethernet network can talk to Thread devices (and vice-versa: Thread devices can now talk to Wi-Fi or Ethernet devices).
I see why it’s confusing between TBRs & Matter Bridges as they’re both connecting disparate networks that don’t talk to each other. But Thread Border Routers are much simpler, cheaper, and magnitudes higher volume (in # of devices) and they’re essentially required to use future Matter devices.
Thread Border Router: connects Thread network ←→ Wi-Fi & Ethernet network
Z-Wave Matter Bridge: connects Z-Wave network ←→ Matter network (Wi-Fi, Ethernet + Thread if you have a TBR)
Zigbee Matter Bridge: connects Zigbee network ←→ Matter network (Wi-Fi, Ethernet + Thread if you have a TBR)
None of these three need internet connectivity to make these connections. Because it doesn’t make sense: all these networks are local to begin with.
Samsung has claimed it’ll only do the first connection, connecting Thread networks to Wi-Fi & Ethernet networks. Samsung said they can’t / won’t do the 2nd & 3rd connections (Matter Bridges); they haven’t explained why, but it could be a technical reasons (acceptable) or a marketing reason (boo).