Let’s get started with Valve. The company has a pretty rocky history when it comes to PC hardware. It started 5 years ago in 2016 when they had the Steam Machine. Now as is, this was more of a category of hardware rather than a Steam Only made machine. Companies like Zotac, Alienware, and even Cyberpower PCs all had their versions. Steam did have a small fleet of theirs that came with a wild number of different configs. You could have an i3 in there or a GTX titan.
It Flopped. HARD. But at least from this, the steam controller did live on. It did get discontinued about a year later though… So also a flop.