They said BD-R. Blu-ray. Not many computers have Blu-ray drives compared to DVD.
I could have used it, too, but I could not think of anything I wanted to do with it by that time in 2017 -- seven years ago -- despite my proclivity for making backups of films.
BD on a PC has never been common in my world of computing, and by 2017 optical drives in general were becoming very uncommon in everyone's world.
It never broadly caught on.
And even those are mostly download now.