Of course, imagine e.g. games. Setting the refresh rate can be important for a program to work correctly and also performance.
In the case of Mull that’s a part of the Rest Finger Printing (RFP) stuff they rolled out around 102.
I wondered why they did this. I love the idea of Mull but the screen frequency makes it unusable. They can't set it higher but just report 60hz or something? Is there no way to change that?