I think that during the 1950s and on into the 1960s, single action revolvers were in the ascendency, mainly because of their use in television westerns and in the movies. There were the popular sports of quick draw and fast draw, most contestents using single action revolvers. That's about when Jeff Cooper entered the picture. He started out managing some of these shooting games. So, somehow, people got the idea that single action revolvers were faster than double actions and apparently, more practical. Partly for the same reason, presumably, that's about when the first reproduction single actions hit the market, Great Western probably being the first.
Large frame double actions were apparently scarce in the same period, although second hand New Service/M1917 revolvers for sale appeared in all the magazines. So overall, I don't think it's surprising that single actions were what people thought of when they thought of revolvers. Double action autos were just coming along around then, too, but people still thought of revolvers as being better, in spite of the numbers of European automatics that were being offered for sale then and most of them were single action.
And that was 50 years ago!
Large frame double actions were apparently scarce in the same period, although second hand New Service/M1917 revolvers for sale appeared in all the magazines. So overall, I don't think it's surprising that single actions were what people thought of when they thought of revolvers. Double action autos were just coming along around then, too, but people still thought of revolvers as being better, in spite of the numbers of European automatics that were being offered for sale then and most of them were single action.
And that was 50 years ago!