The standard position for graphics card has been horizontal, for many, many years. I don't think the standard position for a cigarrete lighter is upside down, to begin with.
Next, for your "solution" to work you need a special case that allows for the card to be installed vertically, which is not common.
Next, for your "solution" to work you need a special case that allows for the card to be installed vertically, which is not common.