I had a '14 Unit for a number of years that saw a variety of configurations from onesie to internal geared hub to 1x10 with a dropout with a derailleur hanger.
One of my favorite bikes until it got poached off the streets of Seattle by a bottom feeder. Replaced with a Ti Honzo with same dropouts to allow optionality....
Yay from me but I have less discerning taste (ie: a Kona is fine for my needs and easy to get) and very little time to dicker around looking for esoteric brands and building up rolling exotica (all the power to you if you do!)