Honestly I’ve tried jellyfin and I have a hard time agreeing with this for a few reasons:

• UI generally more unresponsive than Plex;
• changes to correct a show/movie being assigned the wrong show/movie metadata very slow to propagate if at all, same for changing other library options like title language preference;
• generally slower to buffer and get into videos;
• very rough android lollipop UI;
• not as easy to set up tech illiterate friends for play together.

I’ll give you that morally jellyfin is less customer-adverse than Plex management is at the moment and it is more open in some ways so you can have more plugins and add-ons that Plex lacks, and sure it’s a free product so it should be given some leeway, but if I just listened to all of the people saying jellyfin is just so much better I’d think it was an objectively better offering, but it’s not. When it comes to what I care about, it fell short, so just giving my 2 cents. Still worth trying, considering you can just point it to the same media folders, but yeah not god’s gift on earth.