Gregory's Server@lowqualityfacts the answer probably involves the vast majority of potential users requiring seamless simplicity.
Like: pick up a remote control for a TV that you never used before, it's likely that you'll have some control over the TV by simply clicking something. You'll soon figure out how to change channel despite clumsiness.
Ultimately: a single click from one channel to another, to another, to another, and raise and lower the volume, and mute, and so on — without having to think about anything REMOTELY like federation between BBC1 and BBC2.