Optical media’s rise and fall — CD-ROM through DVD and eventually Blu-ray — traces a genuinely complete arc from revolutionary to functionally obsolete within roughly three decades.
CD-ROM: A Genuine Leap in Capacity
CD-ROMs, holding roughly 650-700MB, represented a massive genuine leap over floppy disks’ mere 1.44MB — enabling entirely new categories of software (multimedia encyclopedias, genuinely full-motion video games) that were simply, physically impossible to distribute on floppy disks at all.
DVD: Enabling Home Movie Distribution
DVDs’ significantly greater capacity (4.7GB single-layer) made full-length movie distribution on optical disc genuinely practical for the first time, directly enabling the DVD rental and sales industry that dominated home video for roughly a decade and a half, alongside the parallel, extended decline of the earlier VHS tape format.
Blu-ray: The Format War’s Genuine Winner
Blu-ray’s victory over the competing, incompatible HD-DVD format in the genuinely infamous mid-2000s format war secured its position as the higher-capacity successor to DVD — though notably, this specific format war’s ultimate winner arguably mattered considerably less in the long run than either side anticipated at the time, given what actually happened next.
Why Optical Media Ultimately Declined
Streaming services and digital downloads made physical media distribution genuinely unnecessary for most consumers — no longer requiring any physical disc at all, no shipping, no genuine storage space, and instant access replacing what had previously been, at best, a same-day trip to a physical store or a multi-day mail delivery wait. Most new computers stopped including optical drives by default entirely within roughly a decade of Blu-ray’s actual mainstream launch.