It depends. For typical software and websites, beauty matters every single time: when you like something more and more and more every time you use it, to the po

It depends. For typical software and websites, beauty matters every single time: when you like something more and more and more every time you use it, to the point of increasing usage, recommending it, spending money and so on; and when you hate something so much that functionality is effectively reduced by avoidance, distraction, fatigue, rage quitting etc.