For me, it’s just too much risk. I don’t want to have to worry about counterfeit discs or a silent downgrade from the manufacturer. Those inorganic discs are slated to last a long time, but who really knows? A set of HDDs in RAID with a 3-2-1 backup strategy is the gold standard. HDDs do fail, and I’ve already planned for that.
You do point out some good points I didn’t consider before for BD-R, but for me, it’s NAS and sneakernet with flash drives for the homies. Hardly anyone I know has an optical drive anymore, much less a Blu-ray drive in their PC.