Paul,
I agree with you comments on component sizes, I always thought that heat dissipation was directly related to surface area, as far as resistors and heatsinks were concerned anyway.
It's no wonder Home Electronics break down so often these days. [Linked Image]
Have you also noticed, that while equipment itself is getting smaller, so are the ventilation slots or they are non-existant?.
With some equipment I've seen recently, it's a wonder that they don't need a fan to suck all of the heat out. [Linked Image]