Plex is using the feature for its music player side project for the time being, not its main media player app.

You can make or create an M3U playlist using Media Player, Notepad, VLC media player, PotPlayer, etc. in Windows 11/10. Learn how.

VLC player settings can be configured to auto-load music files from a folder to the VLC Playlist. Refer to the steps and instructions outlined in this guide.

A music player by Plex called Plexamp uses ChatGPT to create playlists through a feature called "Sonic Sage." Learn more.