Webpack isn't like Gulp at all. It's absolutely insane what Webpack can do. It can solve any asset-related problem imaginable. Compile SCSS into CSS into JSON and require it in your Javascript? Convert SVG images into data-URLs that work on all browsers? Manage async dependencies in your JS code without dynamic script tags or global variables? Automatically figure out exactly which assets you need on which page and chunk them all together? All of the above.

Webpack does a lot more. Gulp is just a glorified (and cross-platform) make.

Webpack is amazing. You can even use Gulp with Webpack. Both are not identical tools.