I used plex for like a decade. I loved it. It had all the features i would ever need. A year ago i tried out an open source media server called Jellyfin and was blown away. It was so easy i started digitizing my library again. I use makemkv to backup the bluerays (it handles multiple audio streams too), and handbrake to reencode them to a streaming format. If you encode the movies into a streaming format, there’s mo need to re-encode when serving them, thereby saving a lot of provessing.