[iso1631]

> nothing beats Blu-ray UHD disks

Uncompressed 10 bit YUV444 UHD at 3840x2160 and 60fps runs at 15gbit a second, so you aren't getting a complete compression artifact free viewing experience. The largest UHD blueray will only deliver at 1% of that speed, and if you could cache it you'd get less than a minute's worth on the disk.

Now you might think that the compression you choose is suitable, and perhaps you'd be right, but it's not 100% compression artifact free, and realistically you aren't going to be seeing uncompressed UHD outside of a broadcast facility. When I stream UHD from say a music festival, I'm compressing it for the WAN section to around 120mbits of h265 at 2160p50 (europe). Even with that level of compression (15:1) it's likely better than your UHD disk.