The glass terrariums look way nicer, I only use plastic boxes if I have no terrarium (yet) or for growing out small ones. Besides they all require different sized, shaped and ventilated enclosures, a uniform box size (that I can't even look into, wtf?) would be useless and unaesthetic.
I'll never undertand people that put up racks in their home. Those are for breeders that want to maximize profit with minimal costs, not for appreciating your pets.