Why do people like viewport shots so much? Well, it's likely due to the algorithms, but honestly, it's also because we're all process nerds. It's much easier to recognize the small details an artist packed into the final piece and appreciate the craftsmanship.
This viewport render surely offers a detailed look at this incredible machine designed by Alex Senechal, which he called Autonomous Reloader. According to the artist, it's an optionally manned logistics unit that stores and dispenses ammunition, engineered specifically for operation on alien planetary surfaces. It's also intended to serve as a supporting prop for the main vehicle.
Here are the final renders of this design, along with the video:
