The Playdate Stereo Dock has been shelved So long for now, Playdate Stereo Dock. | Screenshot: PlaydateWell, we finally know what’s up with Panic’s Playdate Stereo Dock. It’s not coming — at least, not for a while. In an update to the Stereo Dock’s page, the company describes the challenges it faced in getting a good prototype, but says that, in the end, the device didn’t meet its stand…