I got an SL and regret that I can't now replace the fancier touchscreen with an aftermarket unit. I'd get CarPlay, but I'd lose the 360 camera view and EV-specific features (charge timer, range estimates, etc.)
Charge timer is the only thing other than the backup camera that is materially improved by the larger touch screen. The charge timer is moved to the little dashboard LCD in the S model, and it’s a bit janky.