Who needs a bluray-r drive when any 4k-r or any 4K-rw or any bluray-rw drive can read a bluray disc? I see seven pages of listings for optical drives on Amazon right now.
Except that when you "purchase" a title on a streaming service, you are "purchasing" the rights to view the title at the whims of the streaming service, who could lose the license to offer that title at any time.
When you purchase a physical disk, it is truly your property in perpetuity (or...