Honestly, while CarPlay works on most "normal" sized car displays, it just doesn't fit the whole UI on Tesla. While I miss it a little bit, especially being able to easily add, say, a reminder to my phone with Siri completely hands-free, Tesla kinda does most everything else. It'll even allow you to respond to text messages with voice-to-text.
It'll be less of an issue if & when Tesla opens their own app store.
It'll be less of an issue if & when Tesla opens their own app store.