Most of what Apple sells is mobile and AMD is woefully behind there. If AMD can beat Intel at mobile, THAT’S when you can seriously consider that Apple may move to AMD.
amd just pushed their 4000 series that is focusing heavily on laptop/mobile.. and they blow intel out of the water.These are mobile chips. AMD is not ahead of Intel on the mobile side of things. What will be interesting is to see how the non-mobile Intel processors compare to AMD's desktop offerings.

Early listings reveal first 8C/16T AMD Ryzen 4000 mobile APUs
The AMD Ryzen 4000 'Renoir' APU lineup is expected to become official early in 2020.
