Oh, man. I got Intro Skip set up on my Jellyfin this weekend. I've been slowly migrating away from Plex. On Plex, intro skip is a Premium feature, but on Jellyfin, it's just a plugin.
Anyway, I just finally tried it out, and it works fantastically. Just like a regular streaming service. Sure, it took a few hours to build an index for all my library after I installed the plugin, but honestly, that wasn't that long.
I should've fully switched to Jellyfin ages ago. As long as my wife is cool with the Jellyfin interface (at least, in the Roku client), I can fully delete Plex Media Server and forget about it.
The only feature that Plex has that I don't see any way to make work easily with Jellyfin is sharing my library (or shows from my library) with people outside my household. I never actually used that feature on Plex, since it also requires a Premium subscription, but it would be cool if Jellyfin could figure something out like that.