My use case is when I am public speaking. I either use the stopwatch or a countdown timer in the corner of my screen to give me an idea of my end time.
While I can fix this by messing with windows power settings it would be super-convenient if there was a setting in XNote Stopwatch that kept the computer awake while it was running.
I'm thinking of something similar to the PowerToys "Awake" program...
The idea is if I am speaking I don't want to forget to change my settings and have my computer go to sleep in the middle of my talk. Since I always start XNote Stopwatch before I speak this solves my problem very neatly.