Rocketman nailed it: marketing. Remington had very few vanity grades. Look at Parker. They had fewer field grades than vanity grades, if you start counting vanity grades at the DH. How many professional shooters used a Remington compared to Parker, LC Smith, etc? Remington got out because they (probably) really knew how much/little they made on a SXS, while Parker had only a rough idea. The strategic decision to get out of the SXS business was the correct one.