JavaScript is just wrong example. It very early has become uber-tool, when appear first specification of ECMA-script (essentially same gramma, but was universal

JavaScript is just wrong example. It very early has become uber-tool, when appear first specification of ECMA-script (essentially same gramma, but was universal language not tied to eny platform or specifics). But if talk about business, I remember Ford's phrase: "develop product, which will fit expectations of 80% of your clients; 10% will just change mind; 10% will pay additional money for customization".