Zigbee or Thread doesn’t actually stop them from adding cloud connectivity, they all still do. But you yourself can stop it. Similar to the “gateway” you suggested with dedicated WiFi, they sell you a gateway for Zigbee or Thread, which then connects to the cloud/internet to allow you to control your stuff. As they would with a WiFi gateway.
The protocol isn’t “less capable”, it’s intended use is around (home-)automation. It is low power, low bandwidth and most importantly both are a mesh network. That means that while you have a central point to access them (at least Zigbee has exactly 1), they all talk to each other and for a fully connected mesh. A device doesn’t need to be able to see/hear that central point. It can send it through a multi-hop route, and that route is dynamic so when a device leaves (out of power, turned off, …) the packets basically just find their way. Generally anything that has a stable power sounce will act as a router and forward packets. The low power part means that if you have a battery powered thing (remote switch, thermometer, …) it can run off a single button cell for like a year or so. With wifi it would last a week, maybe two. The bandwidth thing is related to that as well, as a thermoeter needs to send the temperature and/or humidity maybe every few minutes, or even just when it changes and there is no need for that. That comes with power usage, complexity and many other downsides, but of course a zigbee device can’t stream video or something (like a security camera would need to).
When using wifi, any device needs to be in range of the access point. You can have multiple access point but those aren’t that cheap, and should be wired in. Devices only ever talk to the access point. When multiple devices talk to each other, it goes to the access point who then sends it out again to the other device.
There are great writeups on the internet, just google “zigbee vs wifi” or something. I’m not gonna repeat what
Side note: you can reply to more than 1 paragraph in a reply. No need to reply three times, but I guess I’ll stick with it now.
Zigbee or Thread doesn’t actually stop them from adding cloud connectivity, they all still do. But you yourself can stop it. Similar to the “gateway” you suggested with dedicated WiFi, they sell you a gateway for Zigbee or Thread, which then connects to the cloud/internet to allow you to control your stuff. As they would with a WiFi gateway. The protocol isn’t “less capable”, it’s intended use is around (home-)automation. It is low power, low bandwidth and most importantly both are a mesh network. That means that while you have a central point to access them (at least Zigbee has exactly 1), they all talk to each other and for a fully connected mesh. A device doesn’t need to be able to see/hear that central point. It can send it through a multi-hop route, and that route is dynamic so when a device leaves (out of power, turned off, …) the packets basically just find their way. Generally anything that has a stable power sounce will act as a router and forward packets. The low power part means that if you have a battery powered thing (remote switch, thermometer, …) it can run off a single button cell for like a year or so. With wifi it would last a week, maybe two. The bandwidth thing is related to that as well, as a thermoeter needs to send the temperature and/or humidity maybe every few minutes, or even just when it changes and there is no need for that. That comes with power usage, complexity and many other downsides, but of course a zigbee device can’t stream video or something (like a security camera would need to).
When using wifi, any device needs to be in range of the access point. You can have multiple access point but those aren’t that cheap, and should be wired in. Devices only ever talk to the access point. When multiple devices talk to each other, it goes to the access point who then sends it out again to the other device.
There are great writeups on the internet, just google “zigbee vs wifi” or something. I’m not gonna repeat what
Side note: you can reply to more than 1 paragraph in a reply. No need to reply three times, but I guess I’ll stick with it now.