(a) Agree.(a)I actually suspect (partly because Tesla is starting from scratch) that for the volume of vehicles that Tesla is producing (even when they start putting out Gen III) that touchscreens are probably cheaper overall than buttons. (b) I don't ever expect a Tesla without the large central screen. Unless that concept is banned by law for some reason.
(b) Agree except for the "large" part, unless you consider ~11 in. "large".