Reliability of quietness of course. I love the fans in my PC, the way they make almost no noise. But they make noise. And worse, they are a marvel of engine

Reliability of quietness of course. I love the fans in my PC, the way they make almost no noise. But they make noise. And worse, they are a marvel of engineering. If some accident of dust or bumping were to upset their balance I fear will I be back to the loud old days. Worst of all, they are moving parts that might simply fail. Having a thing that is fanless from the start is much less likely to suddenly find its assumptions about heat dissipation violated.