Here is what Marek said in his interview with Xocliw on the release stream though: "[...] one clarification: Of course there is the paid DLC, but it's quite cheap - only $4 - and everything else in this update is for free, you know, including this scenario [...] and also including this new seat." Later on (18:29 on YouTube) the dialog was: Marek: "George(?) had a clarification: The small control seat is not part of the deco pack?" - Xocliw: "It is. It is part of the deco pack." - Marek: "Ok... because some people were asking. I wasn't sure [...] which is what." (Watch video for better context.) My speculation is that they did have internal discussion about the seat and someone else made the final call on it, causing Marek to misremember during the stream although his personal blog also lists the seat as part of the DLC. I like to give people the benefit of the doubt and allow for the correction mistakes and wait and see if a pattern of broken promises or misleading ads develops. Frankly I think neither seat, nor transparent LCD, nor half stair-case are strictly decorative, but the "open cockpit" is distinctively more essential for some vehicle types.