Originally Posted by cyccommute

I can’t speak to the carbon fiber part but several thousand miles of touring, mountain biking, and commuting on aluminum Hollowtech II cranks says that you are wrong. It’s a robust and simple system.

In fact, the technology is ideal for touring. I had a chainwheel issue in Canada that required a change of the inner chain wheel. With the Hollowtech crank, the chainwheel change was trivial. The same couldn’t have been said of a square taper. I don’t carry crank pullers while on tour.