My prediction is that more devices will start to come with an eSIM that phones home and downloads more ads or uploads user data whether you give it WiFi access or not.
Amazon Sidewalk can also be used - it automatically finds devices on other networks (like your next-door neighbor) and sends data through their devices in case you don't connect your device to your own network.
Have you ever seen TV not connected to the Internets? Some models refuse to work with "no free storage" alert if it has spywared too much data about the used (used is any user of proprietary sw). When the used connects the snoop-TV to the network it of course unloads the data.
I still have a dumb monitor that costs more than a TV that would have a larger diameter with an HTPC that is really just a regular Linux install and that runs open source software on it. Which software has changed over the years, as has what kind of "TV" I get on it, from actually having a cable TV tuner in there to all streaming or local files. Over that time frame, it has become increasingly harder to get things to work "properly".
As in, yes there are caveats to this of course. Like there's no Netflix (/insert your favourite streaming service) app for it and you probably can't get 4k and/or surround sound from in-browser. As in, they're intentionally making the experience of people actually paying money to them worse.
It doesn't need to be lifetime, only as long as devices are supported. Also, electricity meters makers somehow solved this problem. I am sure a subscription won't be expensive if the device doesn't use too much data. Also the device maker can pay with collected data or advertisement.
