brazen, thanks for your history. You sound like a kindred spirit.
In the heyday of BD, when BDs were even more expensive than the UHDs of today, I ripped a lot of BDs to external hard disks which I placed in external disk-docking stations. I did this for reasons that I won't detail.
As the price of blank media has come down so dramatically over the years-- BD-R single-layer at first and BD-R double layer later on, I have transferred many of those files back onto disk, so in this repsect you and I are different. Unless I see a compelling reason for doing so, I won't go back to storing movies on any kind of media server.
Since I too like "Last of The Mohicans", and you are so impressed with the UHD version over the BD, that'll be the second UHD bd I'll buy. If you have any other UHD recommendations, I'd love to hear them.
BTW, what display are you using and are you also using it as a computer montitor?
To keep this at least slightly on topic, I think it's great that DeUHD has provided a means of people backing up their UHD BDs.