The Pentax M series bodies are so small that taking a spare body isn't a problem. I'm coming around to thinking that I'd really hardly want to bother with a true point and shoot when an M plus 40mm pancake lens is such a compact and versatile combination.

Why so relatively few MXs? I'd guess it's because so many like myself were bowled over by the prospect of automation (but later realised the error of our ways!)