If you want immutability, Vanilla is the only good option right now. Services can be a nightmare on Fedora’s immutable systems, and some applications (qbittorrent, in my experience, though I haven’t seen anyone else have issues with it specifically) sometimes just outright decide to off themselves. I wouldn’t say it’s a bad distro, but recommending it to someone who states they don’t know much about computers could cause them trouble in the long run.