The Intel i5-8210Y is an oddball. Not only did it not exist until the MacBook Air was announced, its specs don't quite fit in with the rest of the 8th generation Amber Lake lineup. Moreover, its specs are exactly the same as the i7-7Y75 (in the 2017 MacBook) when configured at 7 Watts. The 7 Watt TDP up setting for the i7-7Y75 is exactly 1.6 GHz base and 3.6 GHz Turbo. Could the i5-8210Y simply just be minimally modified TDPup version of the i7-7Y75, perhaps with a small process change (14++ nm instead of Kaby Lake's 14+ nm)?