Remember those «experiments» that Steam Labs is conducting? It's been awhile since we last talked about them, but it was basically a beta testing system for new features on Steam that users could opt into or not, depending on their interest in whatever's being offered. Most of the new features are for making the great mass of games on Steam more manageable, through better recommendations or more flexible ways to browse.
The new Store Hubs experiment that went live today does a little bit of both
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