light! We cover a couple of bikes a year with low gears in that range, almost always bikes spec'd w/ Shimano road drivetrains, as that's about as low as they can go without some modifications.
In those cases (I'm thinking of a bike like the Niner RLT https://www.adventurecycling.org/default/assets/resources/20160201_RoadTestNiner_Legan.pdf
) some of the rationale is often that the bike could be a good touring platform, though perhaps not exactly as equipped from the manufacturer. Or, especially with the kinds of bikes we might cover in the February supported touring and events issue (keep an eye out for a GT in the 2017 issue), we're looking at sort of "quiver-killer" bikes that folks might ride unloaded in Ride the Rockies-type events or very lightly loaded on a credit card or supported tour.
Coming out of Interbike we saw some intersting "micro-compact" cranksets that should be interesting to keep low gears low with road drivetrains and continue to see manufacturers dropping front rings bit by bit to gear bikes lower in the adventure category, a welcome change that saves consumers from having to immediately make changes.