Gull-wing doors surely are designed to do one thing, sell the car on look alone. Surely people know they're impractical; but they have the essence of supercar in that impracticality. I had a Lambo' Countache poster as a kid, the flip up doors were probably terrible in practice but they had an evocative unusualness that showed this was no ordinary car. I imagine it gives the vehicle a lot of free marketing and a strong differentiator.

As far as I know, the laws of physics governing car doors hasn't changed in the last decade.