We all remember drawbacks of set Porsche 911 GT3 RS 42056 (disappointing functions, high price, error in transmission and Lego's reaction to feedback about it). With this in mind when I looked at the contest theme for the first time
"In the beginning I looked around but couldn’t find the car I dreamed of, so I decided to build it myself."
I thought of it as "you didn't like our Porsche set? Build one yourself". And they didn't mean Porsche of the future but Lego model of the future - which can be both existing Porsche or futuristic one.
Maybe this is what Lego had in mind originally?