Roll is a great beach bike too
I just moved from the Washington coast, where low tide leaves vast hard packed sand beaches.
I found that the knobs on knobby tires on fat bikes dig into the sand too much, making for hard pedaling.
However, the smooth 2.3 tires on the Roll skim over the hard sand, hardly make a dent.
Bonus is they give good flotation traction on soft trails in the woods and awesome contact patch for cornering on pavement. Front tire washouts almost never happen.
As an old guy with a stiff back and sore wrists, the upright bars and cushy tires are much appreciated.
I have been riding classic steel MTB's with street tires for years, but the Roll really puts a smile on my face.