Originally Posted by
volosong
And ... if triples are "obsolete" and on the way out ... why do almost all mountain bikes still have triples? Are they hard to shift and finicky?
You must not have looked at new mountain bikes much lately. 2x10 is the coming thing in mountain bikes. It actually makes more sense with mountain bikes than with road bikes to eliminate one of the rings (the big ring).
I too hope that triples stay around forever. They are the best solution for some bikes and some people.