I have (and have a Jellyfin server running on the network). IMO, it's nowhere near as polished as the 2017 version of Plex. Cover art and metadata matching is terrible. Plex seems to handle slightly "off" filenames and folder names far better.
Every so often I update jellyfin and try again, only to find it's still a worse experience than Plex.
I'm more than willing to take the trade off of slightly worse metadata and a less polished UI vs plex reporting all my media, habits, etc to their movie studio bed partners. They've already turned on their users and are abandoning what made plex great to begin with. Once you get used to JellyFin it's really great.
This is why I never take the jellyfin evangelicals seriously. Plex is good software - nothing has been taken away and my experience with it has been consistently good and stable for multiple years.
> plex reporting all my media, habits, etc to their movie studio bed partners
There is no proof that they're doing what you're claiming. From what I've seen, people love trying to to push jellyfin by making things up about plex. Also a polished UI/UX counts for a lot more than the solo-user jellyfin crowd thinks.
I have also googled this, and this does not reliably work - especially for things that aren't TV shows, such as videos from YouTube channels or music videos.
That said, it does feel like PLEX hsa been introducing better features and cleaner UI since jellyfin launched. I wonder if they keep track of Jellyfin installs on local system. Competition is good.
It's not as good as Plex. I hope one day it will be, it continues to improve, but it's a worse experience. Once they have proper intro skipping, I'll check it out again to see if they have fixed their other issues.
Fwiw, the Intro Skipper [0] plugin is actually fairly straightforward to install and set up and works as advertised (I personally just have it configured to auto-skip).