Trust me Hippie, ask Jeremy as well, he can back this one up....
In a perfect world they all thermal and bunnies run free.
Not sure if Serum is disagreeing just to disagree or what, I would like to see some facts to back up this information. Then I can send you several bags of "facts" also. I have seen it numerous times in person, controller smokes...regear, try same new controller, runs for a year.
Now for my facts....
Here is a Hacker ESC in perfect working order, overgeared and nothing else.
I guess this is a "thermal"
Not trying to fight with you serum, but you are giving incorrect advice that can be a costly mistake for someone who takes it as fact.