There's nothing new here. It's been happening for a long time with certain games, Ubisoft and EA in particular would EOL games last decade and there would be no more option for multiplayer, as they controlled the servers.
Also, some tech should be obsolete but it's not. There is something on the order of a billion Android phones that are completely vulnerable to awful security issues but are never going to get an update. That's a billion or so people walking around with a device in their pocket with a camera, microphone, GPS and most if not all of their important account details that have no defence against known, proven attacks. Sure it still makes a phone call, but at what cost? What about all those computers still running XP, not your problem, until they're used as zombies in a DDoS against your business or a service you use. Or they're running in your hospital and some enterprising person on the other side of the planet decides to install ransomware on them.
Another issue, and one I think everyone might have had in mind when debating Bryan, is that some devices are going to rely on server-side processing to do their magic. For example, Amazon Echo. Though, if you willingly put a microphone in your house so that Amazon can record everything that happens in order to sell you more crap, I'm sorry but we can't be friends.
The only answer in the long run is consumer awareness, that your device and/or software is reliant on the manufacturer/maintainer and thus YMMV. Openness or guarantees from the company might be a feature or requirement, though right now this usually gets sunk by Moore's Law and the quest for newer and shinier.
Edit: I was way off, it's 400 million according to The Register. Still a ridiculous amount.