> Absolutely not. Have you watched modern streaming services lately?
Of course I have - a typical Netflix movie is between 3-6GB.
Apple TV is the only one offering higher bitrates (which is why I use it, even though we're an Android/Linux only household, with iTunes running in a VM to buy movies from Apple TV).
> There is absolutely no way you get something anywhere equivalent to a recent Severance episode (4K Dolby Vision Dolby Atmos) that Apple is streaming to you at ~25Mbps onto a DVD.
Severance episodes, in 2160p with Dolby Vision and DD+/Atmos audio, are 8.3GB-8.7GB each. While you're technically correct, the point remains.
> I believe the average home connection is something like 100 Mbps if not better, and streaming services really have no trouble delivering Blu-ray quality 4K video to the average US consumer.
A typical 4K UHD bluray has a bandwidth of 95Mbps-120Mbps. A far cry even from the 25Mbps offered by Apple TV, let alone the 6-10Mbps offered by Netflix.
> I think this is actually a bigger barrier than a lot of people assume. I have personally considered the idea of my own media server but keep getting put off by the fact that I really will need a very large NAS-grade HDD for it.
I have a blu-ray collection, I do not have a blu-ray player. I watch my movies by ripping them to my NAS and playing them from my NVIDIA Shield TV.
If you don't do any transcoding on the NAS, you can use an old ThinkCentre or HP Microserver (about $60-$100).
If you just rip your own movies from blu-ray, you don't need any redundancy, so you can buy a single 12TB drive for $200.
That's about $250-$300 for enough storage for 450 1080p blu-rays or 160 4K UHD blu-rays.
The only remaining cost is the content, but usually you don't just watch new releases. Used blu-rays are available at e.g. worldofbooks or rebuy for $5-$15 each.