The removal of Kinect from the Xbox One retail package was the start of the rapid decline and phase-out of the unit within Microsoft. Developers like Harmonix that had been originally targeting games to use the Xbox One had put these games on hold until they knew there was enough of a Kinect install base to justify release, which resulted in a lack of games for the Kinect and reducing any consumer drive to buy the separate unit. Microsoft became bearish on the Kinect, making no mention of the unit at E3 2015 and announcing at E3 2016 that the upcoming Xbox One hardware revision, the Xbox One S, would not have a dedicated Kinect port; Microsoft offered a USB adapter for the Kinect, provided free during an initial promotional period after the console's launch. The more powerful Xbox One X also lacked the Kinect port and required this adapter. Even though developers still released Kinect-enabled games for the Xbox One, Microsoft's lack of statements related to the Kinect during this period led to claims that the Kinect was a dead project at Microsoft.