Why don't modern PC cases have spots for optical drives?

Why don't modern PC cases have spots for optical drives? pc case with optical drive slot Slot Flexible Relocation Cable Riser Adapter Cable $ Sold Out Dark PC Case w DVD Drive Bay Regular price $ Sale price $ Save $ pcie x4 in x16 slot My PC is raised a good 4 cm from the desk to allow for air intake case, therefore creating turbulence and hot spots in the PCI slots

pcie x4 in x16 slot A cavity for a disk drive in a computer cabinet Drive bays today are typically wide, which accommodate optical drives and , and

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