Sooner or later continuous improvement, by any individual or organisation, runs out of steam.
Marching up the slope ahead of us makes sense as an effective way to move onwards and upwards, until we reach the summit. But the summit of what? Most likely it is not the summit, it is just a summit.
There are other summits, and many of them are higher than this summit. Now what?
Discontinuous improvement is called for, to transition across the valley or chasm to the slope of our next, higher challenge. With sufficient resources and expertise, we might be able to build a bridge or to swing or, even, fly across. Without them, we must commit to descending into the valley.
Or, of course, we could just stay where we are at the top of our little summit.
The questions about innovation are not about why we innovate or whether to innovate. They are about what, when, where and how we innovate.