I mean you can still use Bluetooth which allows you to control and listen to all your music through the touchscreen. Or you can use the built in Apple Music, Spotify, or Tidal app. You would have to pay $99 a year for the mobile connectivity, but honestly I would pay for that anyway to have Sentry mode, turn on the AC/heat when I leave my desk at work, traffic updates, etc.
My iMessages pop up just like they would on CarPlay.
I don’t have anyone else driving, but I am pretty sure options are basically saved by the individual key that you use. I use my phone as my key. If someone else used it, I could program their phone as a key, or give them a keycard similar to a hotel key.
Honestly, I mostly agree with the OP and don’t really care that much about CarPlay. The Tesla interface is fine and it’s all integrated pretty fluidly with the car. I can understand why CarPlay isn’t a great option for Tesla with FSD. You basically would have to use their map interface for proper FSD integration. I’ve only owned the car a little over a month, but I just got my second OTA software which I consider pretty damn cool as a tech nerd.
There are of course things I would change that I don’t really agree with if I were in charge, just like any electronic device. Elon is Elon and is firm with his beliefs, which can obviously be frustrating.