This release focused more on hardening the core server and reducing edge-case problems rather than adding headline features. For many users, the primary benefits are fewer playback interruptions, smoother scanning, and generally more reliable remote streaming.
Version 0.9.17.0 marked the official end of support for numerous platforms. If you are using these systems, this is the last "full" working version available: Plex Support plex media server version 09170 full
Remote access problems
Security
Need help with a different Plex version or setup? Drop the full version string below. This release focused more on hardening the core