As Amazon becomes the latest platform to push an ad-supported tier, TV writers greet this retro model with frustration and, in some cases, disdain: “I thought 'Nine Perfect Strangers' with commercials was horrible,” says David E. Kelley of his Hulu show with breaks.
You can set up different user accounts and grant them different levels of access and functionality (i.e. disallow CPU-hogging transcodes). Users can also be restricted by MAC and hidden from the login screen unless you know the exact login name.
I have Jellyfin on my NAS and the “TV” user with which the living room TV is logged in only has permission to see certain folders of my movie library.