Here's a raw conversion from a Sony A7R2 image shot in low light at ISO 2000. The difference between the two images is substantial.
Here we have lifted the shadows of an image with high dynamic range taken at ISO 5000.
It's hard to believe that we're actually looking at two different raw conversions of the same file!
Large Sensor Under Ideal Conditions
If we compare properly exposed and un-cropped images shot with a full-frame 42 megapixel Sony A7RII at base ISO 100, the difference in noise levels between Adobe and DxO Pure Raw2 raw conversion is modest. Therefore we don't need this tool if we're shooting under ideal conditions with a large sensor and we're not cropping. But how often are conditions ideal ?
Free Camera Upgrade
With this tool you can shoot your camera at much higher ISO, under previously unworkable conditions. You can revisit your high-ISO rejects from years past and re-process them into grainless images.