so i have been a huuuuge doubter of these tesla screens, but i stumbled across some recent videos of this unit in action.
one from last december, and
another from the same user in march with the customer firmware from the facebook guy.
holy cow - that custom firmware looks great! the guy in the video said no issues with ac (both the buttons and the touch screen). he mentions it in the comments. the demo of apple carplay looks superb. really, it looks like the only "downsides" are the boot up time and the odd functionality of the steering wheel buttons. the boot time is not an issue to me. i typically spend a minute or two finding a playlist or getting google maps going. i use the steering wheel buttons a good bit, but losing them isnt a big deal. the functionality looks phenomenal from that demo.