The Product Change Notification published by Intel confirmed that pretty much every single Kaby Lake G, including the Core i7-8706G, the Core i7-8705G, and the Core i5-8305G, would be taken out to somewhere quiet and shot.
Last orders will be on January 17, 2020, and the final shipments are scheduled for July 31, 2020.
Apparently, a sticking point is going to be driver support. Specifically, Kaby Lake G drivers for the custom AMD Radeon RX Vega M graphics come only from Intel. With a normal discrete GPU, the consumer would download drivers from the original company, such as Nvidia or AMD.
With Kaby Lake G toast, Intel said the company will follow its standard policy and provide driver support for Kaby Lake G for five years from the launch of the product. So you are only going to get driver updates for another 3.5 years.