The 3D buttons are missing / not visible, but it is possible to press them by using the touchpad. Navigate to the rear camera, then either one down or one left/right (can't remember). Give it a couple of tries and you'll get there. The 3D mode is pretty good.
At an 8% increase from CT4 to CT4S I would have taken the 4S too. However in Norway the difference was 20% at the time of purchase which I felt was not justified.
Considering the speed the Taycan is able to carry through corners, less time is spent accelerating and braking (if you plan to keep your license). The base motor and standard brakes is plenty IMO.
Have had my CT4 for 3 weeks without any alarm going off. I am using the "My Porsche" app - dealer advised using this over the older Connect app. Btw, my car is parked in an underground car park (with internet reception) - just mentioning this in case anyone suspects that proximity to keys or...
Test drove a CT4S with RWS today. It felt a little softer and riding a little higher than the regular Taycan. I would say it's still flat-ish in the corners but you can feel the weight, so I added PDCC and PTV+ to my order (already ticked RWS). No demo cars around with the tech unfortunately, so...