Originally Posted by
Sy Reene
I haven't checked, but I think the other (albeit related) benefit is that he'd not only get the overall boost in gearing range, but also get this for each given chainring, meaning less FD shifts are also likely.
That is true. I was contemplating trying the 10sp 11-34 over 12-28 for the same reason. Would give me one more low gear from the big ring.