I'm in favor of doing whatever you want to with your bike. I also recognize that different combinations work for different people for complex collisions of opportunity, taste, cost, knowledge, peer pressure, skill, will, and chance. Formula-wise, you get Bike=OxTxCxKxPxSxWxCh, where 'x' is the mystery mashup operator. (Note this formula only applies in relatively free/open societies, and not in totalitarian regimes where only one or two types of bicycles are manufactured, nor in traditionalist bicycle monocultures where any deviation like wearing a helmet or any item of lycra visible or even underneath is punished with scorn). Still, when I see a configuration like this, I'm not filled with negativity or judgment, only wonder: I wonder how that works for someone, are their arms in some kind inexplicable formation which makes this possible? I am on board the "all two wheeled human-powered vehicles are cool" bandwagon. I'm just curious what makes this work for someone. Get up. Go ride.