When you use a compound word like that as an attributive (before-the-noun) adjective it’s common to hyphenate it. Precisely to clarify this kind of situation.
So the defunct smart-home devices from your smart home end up in the smart-home graveyard.
Same goes for man-eating lions and high-net-worth individuals.
Don't expect to see a Verge article written with something like a New Yorker style handbook in mind. It's hard enough for them to get all the facts correct.