It's what you might call a curatorial decision, the Queue. It's not about the most efficient way to get the largest number of people through, but about what kind of experience it creates for the queuers, the passers-by of the queue, and for the viewers of images / deadstreams. And of course, as DT points about above, it's not an especially large number of people for a national event which we are told everybody is part of - a Coventry or Barnet's worth, or 4.5 big Wembley games. It serves the various purposes of signifying huge numbers by its linear endlessness, going on for days, and becoming a spectacle in itself. The queue is a signifier of Britishness which resonates beyond hardcore monarchists. As Dan Snow has observed, it is supposed to feel like an old-fashioned ritual, in keeping with the nation's current appetite for nostalgia and the celebration of a mythical past. I admit to being slightly fascinated by the queue despite hating everything else about the royal deathfest.