When comparing MOC vs Plex, the Slant community recommends MOC for most people. In the question“What are the best media players for UNIX-like systems?” MOC is ranked 14th while Plex is ranked 20th. The most important reason people chose MOC is:
Doesn't use some hideous UI and doesn't take much resources because of it. Plain old simple command line interface like god intended.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Command-line based
Doesn't use some hideous UI and doesn't take much resources because of it. Plain old simple command line interface like god intended.
Pro Doesn't need a library system, just plain folder structure
Pro Fills many niche gaps that other players don't cater to
Pro Supported on many devices
It's pretty hard to find a NAS or STB that doesn't support Plex.
Pro Accessible via web browser
A modern web browser is enough to get everything Plex has to offer.
Pro Added lots of media databases
Metadata for media files will automatically be updated by using media databases. This provides posters, movie trailers, descriptions, information about actors, etc.
Cons
Con Command line
While command line and Linux have gone hand in hand since the very start, it still isn't very appealing to see a program and realize that it's using the command line primarily.
Con Needs registration
You need a PLEX account even if you use it on your local LAN.
Con Proprietary software
Unfree software.
Con No gapless audio-playback
Plex still does not support gapless playback of audio files such as mp3 or FLAC.
Con Playback error: This server is not powerful enough to convert video
More hardware requirements on Plex due to a useless/non-intuitive transcoder. When using lower spec hardware (eg SBC) Plex will not transcode or play HD+ videos. When compared to other packages (eg Jellyfin which transcodes nicely using FFMeg), Plex falls short on video playback and transcode settings to get videos to play (fastest/lightest option still fails).