That's a real dealbreaker. I've never seen an in-house media/nav system better than Apple's, and I don't expect GM's to be any different.
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Do replicate this, you’d either need to sync all of that to your car, or migrate to Google’s ecosystem… maybe both.
With the track record of automakers and data privacy, I don’t know who would knowingly do that. It also seems like a giant pain when nearly every other car doesn’t ask the buyer to make this kind of choice.