Originally Posted by
HTupolev
High/low is a shift pattern.
The issue isn't that it's complicated, it's that the shift when you want to change ranges is pretty big and disruptive. Super-wide doubles usually need to be shifted gently, and you need to dump loads of gears in back to compensate for the ratio change.
When I do shift to the granny up front, it's usually because I just ran into a big and disruptive incline and want to be in the lowest gear as quickly as possible to avoid coming to a stand-still while I gently shift.