Save for the triangle bag which is not very big, I am pretty certain you can mount, attach and carry everything that's on the Allpacka on a bi-fold like the Zizzo. Look at Reddleman's Tern, for example, with front and rear racks and with front block. With the rise of backpacking there's now a myriad ways available of mounting bags on bikes. The gearing and comfort issue too can be fixed, improved and dialed in on a bi-fold. There's nothing in a bi-fold preventing that.