In more modern times, take Bill Ruger for example. Now there's an innovator/designer extraordinaire. All those fine guns he blessed use with. All the different designs..ie read "different designs".
After he refined the large bore single action did he rest on a single success? Absolutely not. What came next was forty years of fine firearms of all shapes, sizes, and calibres.
If Bill Ruger would have quit designing after his first success like Glock did he would have simply been a "one design wonder".
If I'm in search of a polymer pistol there's plenty out there. If I'm looking for a stout, big bore single action there's only one...a Ruger. Just my thoughts, J. Parker