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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.
I sort of understand still selling CF cards. They were used in high end photo and video equipment until not too long ago, and they have storage space comparable with smaller SD cards and USB drives. Plenty of equipment using CF is still perfectly good and still worth using.
I've never heard of a zip card. If you mean the old zip disks (I think the largest was 250MB or so), I can't imagine any reason someone would ever use one of these. Even new, zip drives were notoriously unreliable and not all that widespread. I had one, and I rarely used it in favor of CD-R or RW.