Well, where do you draw the line? Is e.g. the SmartTV an IOT-device, or not? If you want the TV to reach the Internet for some things (e.g. Netflix, Youtube, W

Well, where do you draw the line? Is e.g. the SmartTV an IOT-device, or not? If you want the TV to reach the Internet for some things (e.g. Netflix, Youtube, WhatEv), but also isolate it from your other devices, block ads, yet be able to use the UPNP-mediaservers in your network, and want to use the phone to control it for the things HomeAssistant cannot yet do, then you'll run into some difficulties. They can be worked around, but will need intimate knowledge of protocols and such. Also some of these issues can be worked around by e.g. using HomeAssistant also as UPNP-MediaController, which I haven't gotten around to set up yet. But "true", some categories of smart devices can be nicely sequestered into isolated VLANs.