Let's deal with the leviathan in the room. Many of us took Slayer’s proclamation eight years ago that they planned to call it a day at the end of 2019, to heart. You see, Slayer had always kept it real and told it as it is, so it was only natural that we believed their insistence that this was it. It would therefore be understandable if there was at least some level of resentment to their rather speedy U-turn and return to action. But and here is the rub, Slayer are so good this evening that a) it feels like they never went away, b) it becomes obvious a world without Slayer is an incredibly sad place, we just hadn't realised.