sunroof concept was developed for US/EU markets where the weather is pleasant and a little sunlight feels good and adds to tanning. It is not meant for countries like pakistan where you feel like you're are being slowly baked in an oven.
While I do like japanese cars for their options and quality but man, its a (ab)used car at the price of a new one or even higher.
Also, most people rather stretch their expenditure to afford a big car. So being able to use it on CNG and cheap availability of mechanics and spares is normally a big issue (unless you are quite rich).