Lots and lots of IoT requires internet access and servers to stay up and running for even initialising a device after a reset. Some require these servers to control the device once it's as up. I already own a smartwatch that cannot be enabled because the application that used to initialise it has patched out support for that model.

I was thinking about the Xbox One. Someone opening a shrink wrapped version in 30 years will have a useless brick because it needs to connect to Microsoft servers for the initial setup. I am not exactly sure what it does during this first exchange and how much of it is hardware/software but I'm pretty sure none of it is done in the final user's best interest.