I started with Plex because it was an installable app on my NAS. It worked great with a Roku stick that was given to me. Same for a TV that had the Plex client. It works well for the others in the house. I got a Plex pass on sale a few years ago.

I’d like to switch to Jellyfin, but would need to find the client for 2 TVs and deal with the complaints if it doesn’t work exactly like Plex.