Is this too dorky?

I want "van doors." You know, like the side passenger door on a van. Pop out a couple of inches and then slide back (or slide forward). Would make it tons easier to get in and out of the VX in a tight parking space (since I have cladding, I generally don't worry about door dings and can park in the teeny tiny spaces with little fear).

Anyone know why no car (at least that I have heard of) has had "van doors" as the primary door type? Are they just less reliable or just nobody thought of it?