The design is old fashioned but it really doesn't matter. Imagine if they decided to revamp their UI as a mobile friendly monstrosity with large and padded comp

The design is old fashioned but it really doesn't matter. Imagine if they decided to revamp their UI as a mobile friendly monstrosity with large and padded components everywhere. It would likely be terrible. The compact look they have right now makes it possible to display a lot of information in a small area.