I think DVD sales were immense partly because there was zero competition which made it ubiquitous, and partly because you could put anything you wanted on there; fast, easy and cheap. Crappy soap from the mid-'90s you happened to have digitized tapes of? Just shovel that garbage onto discs and onto store shelves. The market was completely flooded from every direction and people hoarded cheap discs and box sets they never watched once.
Of course the requirements of Blu-ray and entrenched position of DVD would prevent any kind of similar adoption but looking at some of these number I don't think things are that dire:
In its first week of sales in the US 83% of the Star Wars: The Force Awakens discs were Blu-ray, and these were the five top-selling discs in the US for the last week, with the percentage of those being Blu-ray:
- Deadpool (71%)
- Star Wars: Episode VII - The Force Awakens (64%)
- The 5th Wave (39%)
- The Revenant (47%)
- The Boy (37%)
So yeah, DVD-level of sales will never happen again in physical media, but like I said as long as it makes financial sense to keep releasing movies on UHD BD I'm fine with it staying an enthusiast format. If it weeds out all the garbage that wouldn't have taken advantage of the format anyway, good riddance.
HD DVD died because it was pointless next to Blu-ray, UHD BD is not, especially with HDR which makes a big enough difference that even some of the Joe Public might notice.
And why all the negative attitudes around here, why even care about AnyDVD HD if you don't care about quality?