I firmly believe that the Yeoman generator provided by Microsoft is a great tool. It serves all the capabilities to create new web parts, extensions and customisations in the future. With the current support of ReactJS, Knockout and bare-bone HTML version, you have three great possibilities.
This PnP/SPFx generator project goes beyond these possibilities and supports enhanced functionalities. A way to add additional capabilities in the future not even for new frameworks and libraries on the market. It also helps organisations to defined their development standards.