Does WebStorm IDE offer any added value over yeoman/bower/grunt? Or better just to stick to editor like Sublime? So, if one use WebStorm with yeoman-based work

Does WebStorm IDE offer any added value over yeoman/bower/grunt? Or better just to stick to editor like Sublime? So, if one use WebStorm with yeoman-based workflow, he basically use IDE as editor? What confuses me, that many good FEDs I met, use WebStorm.