If that was the case (market not ready for a Ruger SXS in 1976) then why didn't they build a Ruger automatic shotgun? Good Lord, had they taken even 10% of just Remington's business over that time, the Ruger boat would be floating far higher than it is today.

As to market research, all I can say for sure is Ruger never asked me, or, it would appear, a LOT of the people who post here. Too bad. I'm of the firm opinion that a double trigger 16, instead of a single trigger, 6 1/3 lb 3" magnum 12 with choke tubes might have been a heck of a lot easier to build and sell.
Hell, I believe Klunk might have even bought one.
Best,
Ted