Then again, how often do you actually use the on/off button?
I pretty much never turn mine off....since it goes to sleep.
About the only time I turn it off, is to change memory cards, but other than that, I leave it on.....from what other posts I've seen here over the years, I got the idea that was what the majority of folks did?
They could have the shutter switch it on and long hold of "a" button to switch it off. The dedicated switch while not badly designed or anything of the like, it just seems redundant when I can't think of a reason to switch it off quickly.