Yeah, when I started out on Plex, I tried the other services (Jellyfin and Kodi and this other dedi music one), and while they all did what was advertised more or less, Plex was by far the more polished solution with the least bugs for my setup. I also really like the Plex UI, feels well thought out and easy to navigate.

Having said that, I keep an open mind, and every few years check out Jellyfin/Kodi etc.