I have a Winchester model 12 and a Winchester model 120 (budget version of the 1200 - but basiclly same gun)
Not claiming to be an expert on Winchester shotguns - but one reason Winchester sales dropped off and Remington and Mossberg grew was because the cost to manufacture the Winchester was so high.
Remington & Mossberg found a way to keep the reliability at a lower cost - Winchester was slow to react.
Looking at the ejector & bolt of a Winchester 1200 VS an 870 or Mossberg and you can see right away the amount of extra machine work it would take to make the Winchester.
Normally the extra cost of more refined parts would add a benefit - like better reliability of service life - in this case no so much -