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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.
You really should have offsite backup as well. If your home catches on fire, everything will be lost. That can be as simple as taking those BDRs to a friend's house.
Cloud storage is relatively cheap if you limit your storage. You can get 1TB for $6/month from B2, and I think it scales down as well (e.g. 100GB should be $0.60/month).