> Oh, and the fact that it could take well over a minute to load a piece of SW made one less likely to whimsically switch between apps.

The key point here I think is that there's a cost and some kind of friction to making the change.

It's easy to think that reducing friction is always a good thing, and for people in positions in companies trying to maximise user clicks on the Call to Action that does make sense, but for one's own personal attention and focus some kind of friction can actually be a good thing as it can imply and even reinforce deliberate action, which I believe is what's sorely missing from environments that promote multitasking.