I'd guess it's because of the chronograph... there aren't many inexpensive automatic chronos out there, so they'd be reliant on quartz. Which doesn't necessarily appeal to most watch nerds.
Also, it's not as much of a status symbol as say a Submariner, so you don't have the non-WIS wanting a "homage" to appear wealthy to other non-WIS.
At least that's my two cents.
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