Actually they don't. While they recommend you only upgrade using the overpriced kit they'll sell you, it is compatible with standard laptop DDR3 RAM and easily upgradeable.$140 just for 8 gig of ram vs 2. That is nuts! I bet they lock down the 2g version so you cant change the ram yourself too.
Fantastic to hear it runs Plex Server. Curious if it will run Plex Theatre for playback as I prefer this over XBMC and KODI. Does it just run normal linux apps for playback?I'm working on a software overview article for each of the major NAS companies right now. There is a lot to go over for each.
The two most common for home theater use are XBMC and KODI. KODI is just the newer version of XBMC. The software supports 7.1, DTS, Dolby, the HD versions and so on. I use KODI to play back 1:1 Blu-Ray ISOs and it works great.
The system can run Plex Server and it's fast enough to transcode on the fly.