Hard to say. I'm going with [MENTION=203914]Tourist in MSN[/MENTION] on this one. Perhaps not that everyone needs 3 touring bikes, but rather to highlight that there are many different styles of touring.

I'm primarily a hard surface road rider. And, one of these 26" MTB conversions would drive me bonkers on the road.

I've tried some gravel with my Clement X'Plor USH tires, and didn't like the feeling on loose gravel, and had troubles getting the perfect inflation for about 3" gravel stones.

I'm looking towards more of an off-road bike for certain roads/trails. But, certainly won't be giving up the idea of a light fast road touring build.

When I was in Missouri, the Colnago Super with either 23mm or 25mm tires was the bike of choice for the groomed crushed limestone Katy Trail, although I don't think I ever had it heavily loaded on that trail (it has been loaded elsewhere) (comments elsewhere, working on flex issues with road bikes).