It's not without its pitfalls, but Neil Young's painstakingly assembled retrospective is an awe-inspiring labour of love, says Alexis Petridis Archives arrives - a staggering 23 years after Neil Young first started talking about it - heralded as "the most ambitious artist collection ever produced". Indeed, so ambitious is it that Young has written an open letter to his fans: reasonable as ever, he suggests they all immediately buy Blu-ray players, the better to enjoy its 10 discs of music, film ...