Why not underhung voice coil?


Most of the speakers have overhung voice coil, meaning that magnetic gap is very narrow and most of the coil sticks out.  In underhung design magnetic gap is (horizontally) wide and whole coil movement is contained within the gap.  It requires much larger magnet, but supposed to be more linear (lower distortions), especially for big excursions.  It applies mostly to woofers, but there are even tweeters with underhung coil.  Very few speaker companies use underhung design.  One of them is Acoustic Zen.  As I understand it the only disadvantage is increased cost because of much larger magnet, but it should be irrelevant, at least for high end/cost speakers.  Why overhung coil design dominates.  Please help me understand.
128x128kijanki
Interesting one of the best sounding and performing speakers I am familiar with, the Fritz Carerra, uses underhung voice coil. Would never have taken notice prior.
@millercarbon,

”Okay so slow work day here thanks to the CCP virus combined with misinformation keeping everyone afraid to go out (when they could just cover their face and be fine) so I had time to look this one up. ”

I did not realize you were a doctor of infectious diseases.  Where do you get such valuable information from?   I can’t believe our good luck, an audio expert and a doctor.   Who would have thought.  
Millercarbonbuildup’s racist (Chinese Corona Pandemic? What a right wing pile of useless racism, wasting time focusing on excuses and serving to foment local racism against asians) and utterly useless comments simply ignore the fact that even people who’ve used masks have fallen ill and died from Covid 19...firefighters, emergency workers, doctors, grocery store workers...the right wing misinformation campaign is best completely ignored as it’s based on ignorance and falsehoods that are actually dangerous.