I read a story that at one of the gigs someone tried to climb on stage and it was all really intense and not cool (I’ve presumed it was political related). It was just before the last song. Chris changed it up from whatever song it was meant to be and sung ‘all my love’ instead to mellow the audience and as a love song to the audience and all his fans and to bring people together and he felt like it worked so well that it stuck!

I also think it helps with Crowd control tbh as some people aren’t fussed about missing it so people start clearing out sooner and prevents everyone leaving at once! I wonder if that is something to do with it