As a midrange support only, properly made paper drivers can be made to work just as other weird stuff like kevlar, rubber, alu, plastic, mylar, etc. If I remember my specs on this issue correctly, properly layered paper sheets that are epoxied together are actually a pretty good material with decent sonic distortion characteristics without the spikes of lets say kevlar.

Paper also allows you to make a cheap, and poorly sounding driver, and it's a lousy surround material (like any other fiber) because it's sonic characteristics will change as the fibers wear.

I needn't mention most Bose products to my ears sound like; and have the same spectral distrubtion as: stuffing an angry cat in a dryer and mic-ing the dryer vent.