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Next-gen optical disk can store over 14,000 4k movies
(www.digitaltrends.com)
This is a most excellent place for technology news and articles.
Cloud storage is just someone else's computer. That someone else is who the target market for something like this is. Server farms need a lot of storage, and that takes up space. Optical storage of that capacity is great for data you need to read often, which is the vast majority of data on servers.