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Sony is killing off recordable Blu-ray, bidding farewell to disc burning | TechSpot
(www.techspot.com)
This is a most excellent place for technology news and articles.
ISO certification does require a bit more effort than just the bare minimum necessary to legally advertise specific claims about a product.
That doesn't mean all M-Disc manufacturing is immune to shitty business practices of a manufacturer, but they do have to meet certain manufacturing specifications.