Manufacturers are focusing on what sells the best with smallest sale price/production cost ratio. This is domain for tiny subcompact high capacity pistols almost everyone is buying now. They all want smallest 9x19 pistols possible with greatest capacity magazine (basically striker fired KelTeks P11s) .
I simply choose G26, because little more plastic for extra rigidity and durability is good. Revolver sales are much smaller market. These are mostly carried by many women plus Boomers and latter want older stuff claiming older always better, even if plastic was used in construction.