Black Sabbath bassist Geezer Butler spoke in an interview with Billboard and explained why Black Sabbath did farewell tour. He said:

“I felt relief that it was all over, that it was done with, that we’d done a good show – and quite sad in a way to think that we’d never do it again.

It really wasn’t as bad as I thought it was going to be, actually. It just felt right. We’ve been around for 49 years now, and it’s time to call it a day.

It just felt right that this was the last tour. It was mainly done for Tony’s health. He didn’t feel like he could tour anymore.

If it was up to me, I would have toured for the next five years, because I love touring and traveling. But because of Tony’s illness, he just couldn’t travel much more.

It wasn’t the gigs, it was the traveling that really got to him, and the different hotels every night and the stuff like that.

He just couldn’t cope after being treated for his cancer, and we all sympathize with him and were just grateful that we could have done the last tour together.”

Click here to entire interview via Billboard.