Because Knockout is largely "abandonware," Adobe has integrated much of its functionality directly into Photoshop. If you need the results Knockout used to provide, look into these built-in features: Select and Mask Workspace:
So, why should you choose Knockout 2 over other background removal tools? Here are just a few benefits of using this powerful plugin: Knockout 2 V10.387 Plugin Photoshop Free
It preserves fine details such as smoke , fire , liquid , and glass . Because Knockout is largely "abandonware