The pricing is not really justifiable especially given the most use cases of the Mac mini (Home Theater, NAS, Backup etc.) are better handled by other OSes. The NUC8 with comparable specs (sans 6 core CPU) comes at under half the price! If you needed the 6 cores sure but given most workloads other than encoding don't - it's questionable. Even then the 6C processor doesn't cost enough to make up for the difference.
What OSes are better for a "Home Theater" TV computer?? That's a serious question; I recently replaced a creaking old Mac Mini (that couldn't do 4K) with a new Dell, after going a little bicurious with respect to Windows 10 (for software development work)... and, surprisingly, it's a complete and utter shitshow. I was astonished, actually; I had assumed Windows would be better than macOS as a TV computer, other than…
All of the video files reside on a local windows machine and a cheap storage VPS on the cloud(located in NL). Both of the machines run plex server and auto transcode all content to an MP4 container ( HEVC for 4k content ). I force plex on the xbox to direct play all content and it usually works pretty well.