In a 2018 Songfacts interview with Tony Banks
, the band's keyboard player, he talked about this song. Said Banks: "It still really works for me. It's one of those things when we were playing along, it seemed to have a direction. The early part, the acoustic part, was a piece that I'd written on the guitar and I thought it had great atmosphere and it could go somewhere else. We'd already done the song 'The Musical Box' on the previous album, and the idea was perhaps this to be the follow-up of 'The Musical Box.'
But, we were going along, and it was doing some nice stuff, and then we had this other song, it was a song of Peter's called 'Willow Farm' that was a separate song. We were doing this pretty little bit in the middle of 'Supper's Ready,' and I thought, wouldn't it be fantastic if we stopped the song suddenly and just go into this 'Willow Farm,' really ugly little downward chord sequence that happens at the front of it. I thought it would just be such a great contrast.
Once we'd done that, it took on a whole other level. The drums were in there playing heavily and it became such a big thing. And, I think particularly, the climax which occurs with the 'Apocalypse in 9/8,' which is a sort of extended keyboard solo that ends in massive chords with fantastic vocal performance from Peter, it still really works.
It's 25 minutes, and I think if you've got the patience – unfortunately, not many people have the patience anymore – but if you've got the patience I think it's still rewarding now."