Jellyfin for kodi is pretty bulletproof for me although it wasn’t always that way; when I first changed to this setup (bit over a year ago when Coreelec added dolby vision support) there were some headaches because kodi was changing how the db worked at the time (change from kodi 20 to 21 and Coreelec was using the kodi 21 nightlies for dv stuff that hadn’t been brought into final version)
Once the 21 final came out and Jellyfin for kodi was updated it’s been smooth sailing.
That does remind me of another downside though: there’s a minor slap fight on how db management should occur between kodi and jellyfin devs. Like many open source projects they simply can’t agree on anything so each project just does what they think is right. So kodi 22 or jellyfin 11 might cause another scenario like above if they decide to revamp the db again (especially on the Jellyfin side; I would not be surprised if someday they will overhaul the lackluster music portion of Jellyfin)
If you ever do revisit Jellyfin for metadata administration I would suggest posting about your issues on the github for Jellyfin for kodi. I’ve never used Jellycon so I can’t speak to that but Jellyfin for kodi’s github is overall helpful although fair warning that the dev can be a bit curt, especially if your issue has already been addressed and is configuration related. Things may have changed but at least ~ a year ago it was solely developed by one person who did the majority of the support as well. But if nfs is working then why break what isn’t broken?
Honestly the bigger thing is sponsorblock, blocking youtube ads is a big deal but it’s so much nicer to be able to circumvent the internalized advertising. Youtuber spends 4 full minutes plugging a vpn service? Automatically skipped seamlessly
Rooting ranges from very easy (literally go to a webpage, very unlikely you’re on a firmware this old), to medium (put stuff on a usb and try to play some music, may have to try a few times), to very difficult (connecting hardware to the tv), and in some cases is impossible. Don’t update your tv if you don’t have to, lg rarely fixes issues and never adds new features
https://cani.rootmy.tv/