I'm not sure how clear I can be. Let's try this again. Until there's a physical car, available for purchase, with Car Play, I'm choosing to ignore Toyota's confirmations. Why? Because Toyota has said they'd incorporate it in the past. Mazda has been confirming CarPlay and Android Auto for a couple years now. Mazda won't be releasing the upcoming 6 refresh with either system. At the 2017 LA Auto Show, Mazda confirmed they'd bring one or both systems to their vehicles in 2018. Mazda is still ambiguous of when exactly and which models will get the third party system. Mazda also confirmed that Car Play was coming back in March. They were announced as a CarPlay partner back in July 2014, and have confirmed at least a dozen times since then they'd incorporate Car Play in the very near future.
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Ultimately, I don't have a reason to not believe that they would not introduce CarPlay after making the announcement during NAIA for the Avalon. I think the pressure has been a Toyota for quite some time to make the transition and they have been stubborn to do so, and the time has come where they need to open up choices for consumers who are seeking CarPlay as an alternative compared to the competition who has already moved forward with CarPlay integration.
I'm not sure if you've used the latest Entune or even Enform on Lexus vehicles, but it's slow and you can see motion lag while switching radio stations or moving through menus. .
As previously mentioned, I do not have experience with Entune, but for those that do have experience that I have discussed with (And read about) , they have not had good things to say about the user interface, random crashing, disconnect from Bluetooth intermittently, Lag, etc. I think CarPlay is a huge step forward for Toyota, but long overdue to continue forward.