Or because they want to charge a subscription for "premium data" which nobody would buy if there was CarPlay.

You don't need premium data for online maps. Premium data is for sat maps, music and live camera views. Also at $10 per month it's actually quite cheap.

Which is $10 per customer per month more than they’d get if everyone was using CarPlay / Android Auto.

It’s been proven time and time again that vertical integration is a massive money earner and you can bet that if Tesla were to release a smartphone then support for that in their cars would be a software update that follows immediately after. But since there’s no plans for a phone, the next best thing is a subscription-based infotainment system.

Can carplay live stream video from hyundai’s cameras..?

We are talking about mapping and music. Not parking sensors

You mean that feature I've never used?

I pay for premium data only because of Spotify and live traffic. Which I wouldn't have to do if it had CarPlay.

Are you saying you can't listen to music in a Tesla without a subscription?

Bluetooth, radio, usb and using your phones hotspot is still an option (tho unrealistic given how shit iOS hotspot is)

ah right, that is just internet connection for anything else but maps

I'm saying I can't get live traffic on my Tesla maps without a subscription.

Yeah it doesn't seem to be a profit centre, at the moment anyway.

It's also for live traffic.