Roger Glover from Deep Purple:

"We're all about late 60s, early 70s, and bodies have a way of not keeping up with your brain or your career. The time is approaching when it will end, but we don't want to face that. We don't actually want to make a date or a final tour or anything. We just want to carry on as long as nature allows or is kind of dignified. If we can't do what we do anymore, then yes, it's time to stop. But we're still doing it, and we're still enjoying it very much. So all we're saying is the door is closing, but it's not closed yet."

Glover and Paice's Rock Antenne interview:



References:

Hamburg http://buff.ly/2luoS1E
Photo Shoot for Deep Purple's 'Infinite': Exclusive Behind-the-Scenes Footage http://buff.ly/2mbtyxv