I bought both Plex and Emby. I started with Plex but had some technical issues related to my machine having multiple IP addresses so I switched to Emby. I tried Jellyfin before switching to Emby but it wasn’t as capable as Plex or Emby (at least at the time) and I wanted something with some commercial support behind it. I have been pretty satisfied with Emby, but do wish it would get requested features added in a much more timely manner.