I feel Getbig has contributed to his retirement, Hank Wood in particularly.
That said good on him, not sure anyone would want to read his autobiography though
I think his last show, turning up in such a terrible condition and losing ALOT of size, hurt his mentality and there might be more to that story than just turning up out of shape. Only Luke and possibly his close friends will know.
Luke, at his best, was an amazing BBer. Only 32, still time for another run down the line.