This is a fun observation post. I see that my Hub normally runs at an average temperature of around 104-105 degree F. I agree that this temp might be fine, and nothing to worry about.
Today I thought, how will that temp change, if I just put my Hub on top of the HVAC intake register on the floor
Well, the temp fell from 104 to around 98 degree! The red arrow in the graph below is exactly when I moved the Hub on top of the vent. Again, might be nothing great and a lot of you might be already doing something similar, but I got excited by this very simple temp improvement by hub placement alone.