It’s expensive.
That’s my understanding of why it’s not in mass production cars. I read about this exact topic somewhere. Probably SpeedTV.com ‘s blog, which is was by far the best place to ask something like this. A lot of industry guys there. That was some time ago though, on their old platform, now archived. I can’t find the thread.
Here is a keen collection of beautiful examples. The scisor door is a better idea.
Logically – you need a lot of girth in the door of a non-exotic car for side-impact protection. It’s a very different proposition to lift and balance that mass vs. just pivoting it. Also putting the hinge (and support structure) up high on a car is a bad thing. Just a very inefficient and costly option.
Now if your doors are fiberglass and you have aluminum hinges…, but again, that’s expensive.
That’s just my understanding.