The example will be when you add a heatsink. Not only does it increase surface area for dissipation of heat, but the entire system now has more thermal mass meaning that it will take more heat to reach a given temperature even if we disregard the dissipation of heat into the environment.
Heat is never really dominant over temperature (did I say that in the resource?) but the larger the thermal mass, the slower the system will react to a given heat input. This is good for things like intermittent operation. Whereas thermal resistance can be seen as resistance, thermal mass looks like capacitance. So with these resistors and capacitors we end up with a low pass filter. If the resistances are low enough and the capacitances high enough, they will load down the input. Not good for an amplifier, but great for a junction with a peaky power dissipation.
Will I cover this? I'm not sure. Maybe it will get edited out if I don't.
Care to comment on phase change being listed as a 4th method under convection, radiation, and conduction? It's a bit of a stretch (and arguable whether "phase change" is the best term).
