On a related note, I can barely pick up my Roku 3, because it runs so hot, but I haven't noticed any adverse effects from that, yet.
Interesting. Sitting idle, my Roku 3 is only mildly warm to the touch. Does it have to be playing something for a while to get that hot?
Just to add mystery to this: My Roku 3 has been playing virtually continuously since 5:00 AM (It is now 4:20 PM) and it is barely warm. I have never felt anything even approaching very warm with any of my Rokus.
I REALLY wonder why some get so hot and others do not. The only thing even remotely unique about my Roku is that it sits on a metal shelf in my entertainment rack with nothing within 6 inches of it. (The other two sit in a close cabinet to isolate them from IR. They never get above mildly warm either.)
Oh, there is one other thing. During the winter I keep my apartment at 67 Fahrenheit during the day and 62 at night so the environment is cool. During the summer that changes to 77 and 72. Of course my R3 has not, yet, experienced summer but I do not expect that to make much, if any, difference in its overall temperature.