Each to their own and I expect many to disagree but my Darkside experience includes:
Four times east, west, east across Australia, once south to north and around and back to the east. Doing Adelaide to Darwin and back again in August (south to north and back), all on a Car Tyre.
There is no statute in Australia that prevents a CT being fitted to a Motorcycle, however there is one that prevents a Motorcycle Tyre being fitted to a car rim, therefore not challenged in terms of roadworthyness and insurance. My wife feels safer (and more comfortable with the rear Tyre running 28 to 30 lb. I love the grip with a larger patch on the road, even when cornering. Soft sidewalls collapse on cornering and provide a larger contact area to get power to the road _ I love to "slingshot" out of corners.
I've never had problems with "bumpiness at speed. Done the 200km north of Alice Springs when it was unrestricted in under 60mins and the 190km from the last town in Western Australia to the first Roadhouse in 55 mins (some will know that one) in a comfortable balance manner.
But
It is what I use the Rocket for - its not a daily rider. If it goes out ..... its gone for a week fully loaded. I have Progressive springs up front and YSS rear shocks professionally valved and sprung for me.
I am quite large ... I think I make the Rocket look small and it all suites me.
Everyone has advice and I/we choose who we will listen to ..... its the nature of being individuals and having choice ......... someone also told me I shouldn't smoke cigarettes as well but I make my own choices, like never having a dealer go near my Rocket (except once and he was great).
Good article though