If you’re using Kodi, that’s effectively the same thing. Kodi is XBMC. Plex started as a fork of XBMC for OS X. At some point they broke it out into a client/server architecture, which Jellyfin emulated.

If you have one primary client, Kodi is fine. Moving to Plex, Jellyfin, or Emby is more about serving multiple clients while maintaining continuity.