https://www.pcgamer.com/valve-commits-to-steam-machines-though-they-arent-exactly-flying-off-the-shelves/

Earlier this week, Valve removed a link to Steam Machines from Steam's front page—which prompted us revisit this article from last year. Now, the developer has explained a "routine cleanup" tied to user traffic (or lack thereof) was responsible for the omission, and that it remains committed to the SteamOS-driven, Linux-based hardware. 

"We've noticed that what started out as a routine cleanup of the Steam Store navigation turned into a story about the delisting of Steam Machines," says Valve employee Pierre-Loup Griffais in this Steam Community update post. "That section of the Steam Store is still available, but was removed from the main navigation bar based on user traffic. Given that this change has sparked a lot of interest, we thought it'd make sense to address some of the points we've seen people take away from it.