Correct — many cars before the DeLorean had gull-wing doors[1], Lamborghini-style scissor doors[2] also predate the DeLorean by many years, and AFAIK, both of these door styles are still available on production vehicles today.
The most interesting thing about the DeLorean is the story behind its creator and creation[3], not any particular aspect of the design of the final production vehicle.
[1] https://en.wikipedia.org/wiki/Gull-wing_door