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xkcd #3109: Dehumidifier
(imgs.xkcd.com)
Title text:
It's important for devices to have internet connectivity so the manufacturer can patch remote exploits.
Transcript:
[A store salesman, Hairy, is showing Cueball a dehumidifier, with a "SALE" label on it. Several other unidentified devices, possibly other dehumidifier models, are shown in the store as well.]
Salesman: This dehumidifier model features built-in WiFi for remote updates.
Cueball: Great! That will be really useful if they discover a new kind of water.
Source: https://xkcd.com/3109/
Zigbee is local and if you really wanted to you can use Home Assistant 100% offline it will be just neutered and basic.
im not sure why all these people jumped from 'wifi' to 'internet' as if they were the same thing. no one should be exposing their automation devices directly to the interwebs
Sadly, many wifi-enabled devices only work with some proprietary cloud-service and even if not, they're only one configuration error (or intentional backdoor) away from talking to the outside. Better have something that isn't physically able to talk to the internet no matter how badly I fuck up its configuration and my firewall.