No one knows their customers like Porsche. It's not arrogance, it's a response to what customers want and buy. According to my dealer, most cars sold today are PDK-equipped. The minute the GT3 went PDK only, it was a foregone conclusion that the 991 Turbo would follow suit. Let's not forget it's only in the US that you can get a manual F10 M5, and even then I'd bet that the take up is pretty low and the next gen will be DCT only.
2014 Jaguar F-Type V8 S
Range Rover HSE Lux, Orkney Gray, Sand interior
Porsche 911 Carrera S, Midnight Blue, 6-Speed