Hmmm,
Brings to mind an old saying, "Opinions are like @#$%@*&"
Uniqueness is important from one manufacturer to another. But a manufacturer of one traditional product want's to make a new product resemble the old in ways that it can be distinctly identified as "their" product. This may not work for the mass market. But I've never considered single shot pistols in rifle calibers a gun for the masses.
It's a niche market. Take for example the Porsche 911,,,, not a car for the masses. While it has changed over the past 40 years it is still very much recognizable as a Porsche 911. Traditionalists don't like big changes.