My only concern is that Integrated Intel Arc Graphics, for the love of God I cannot find anything about it. Is it good for transcoding? Is the better than Intel Iris ?
But in a device that small, I have serious doubts that you will get the full power out of this CPU. Today’s CPU’s are throttling themselves according to the specifications in the computer BIOS, as well as according to how effective the cooling system of the machine works.
So, while it might work just fine as Plex server, I wouldn’t expect it to handle multiple UHD Bluray rips in transcode mode and tone mapping.