you can climb anything with a double, compact double, or triple, if you use equivalent gearing.
I use a 30-23 (or in extreme cases a 30-27). Tell me. How do I get the equivalent double on a road bike without replacing half the drivetrain?
Besides, y'all are missing a point (one presumes; I'm not going to read 300 posts to find out if anyone got it): For those of us that need the wide gearing (for climbing), a triple offers much closer, more comfortable ratios in the 'normal' range.