Not quite sure how this relates...
The way this relates: I am glad I am an old fart and wont live to see it
Obviously, you've never owned a properly balanced Inline-4 bike, and certainly never a silky-smooth-and-full-of-torque Inline-6 machine...
Meese, Meese, Messe, you are making an incorrect assumption here brother.
I have toured on K16, on Wings and owned a C-14, and the one you fail to mentioned FJR--have YOU own an FJR? I am keen to the FJR because its a bullet proof cheaper bike. But the C-14 power is amazing.
Smooth is indeed the K16 that left me stranded sporting one its maiden quirks. I traded that sucker back for an RT as soon as I hobble into a BMW dealership. It was the funnest bike I ever had, smooth like you say, but not dependable. And as for touring, the K16 is a wind-mill--very poor protection as well as 'an involved and expensive' maintenance cycle. As lousy mpg as the Wing.
The Wing is smoother than all of them...and probably the best hwy bike on the road. Plus the Wing has a great low center of gravity for such big tank-bike.
The C14 and the FJR, both, had that infamous inline 4 high pitch vibration on the throttle side of the handlebar--trust me when I say: I tried everything under the Sun and couldn't get rid of it on either bike. Had I been able to get rid of that numbing vibration I would have kept the C-14 and toured with it. Of all the sports touring bike I own I would chose the C14...probably...or the FJR...given they held up over 2 to 3 months on the road hacking 80 to 90 mph trippings.
I been on that K16 board. I understand the religious affiliation K16 owners have and their worshiping membership with BMW.
But as far as the smoothest RT I ever own (instead of the smoothest bike) you might agree with me if you toured on mine for 3 months straight...without problems, with great wind protection, and packing a lot of stuff.