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I got it on my Model 3 last night. (Interestingly, went straight to 2018.10.5 - I never got 2018.10.1). I sure think it has the AP improvements based on some short drives today..
I just got 2018.10.5 on my Model 3 last night; hard to be 100% sure but I *think* it has the AP updates - seems more confident on two lane roads today.