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Vinyl records outsell CDs for the second year running
(www.theverge.com)
This is a most excellent place for technology news and articles.
Audio CDs are also lossless, often cheaper than buying the FLAC files, and can be extracted to FLAC files. Only reason to buy FLAC is if you want the convenience of not buying a physical product and the quality of said physical product.
Maybe I should have written a longer comment to elaborate on what I meant. What I meant to say is that if your primary concern is sound quality rather than the experience physical media gives you, I would assume a flac file would be a more popular option due to its convenience.