I installed the Insider Preview from scratch (wiped hard disk) on a spare laptop. It reproducibly kills the touchpad and the keyboard after a few minutes. The system keeps running and I can still send it to stand-by and wake it up with the power button, but without keyboard and touchpad input, it's useless. Couldn't even shut down the system without external input devices. That's the kind of quality control I expect from a Chinese eBay seller, but Microsoft?
Driver issue is not Microsoft's fault.