This is the directory of departments for the First Emporiurm Department Store in BSB. Luggages?
I would never use 'luggage' in the plural. For me, it's a mass noun.
But logically, there's no reason why it shouldn't be countable. So it is just like all those other logically countable things which are often counted in varieties of English such as that of Brunei: furniture, equipment, accommodation, information, and many more.
I suspect that 'luggages' will become standard in the not-too-distant future, and it will only be a few old-fashioned people like me that cling to the traditional form and insist that 'luggage' cannot be used in the plural.