Life expectancy of fan with magnetic bearing?
Here's some examples:


M0802512 -- "Life Time: On-going testing"
Sunon Maglev -- N/A (two sources)


In comparison to these non-magnetic bearing statistics:


Sintec sleeve: 45'000h @ 20oC; 15'000h @ 60oC
Superflo: 50'000h @ 40oC
Ball: 70'000h @ 40oC; 40'000h @ 25oC
HydroWave: 50'000h @ 40oCNote: 1 year = 8766 hours.


Looks like traditional bearing MTTF wins! My point is that at the moment this technology is marketing fluff, regardless of its merits. Real MTTF numbers will tell the story... not that these are real numbers: take them with a grain of salt, as they are subject to lawyer jibbajabba and marketing hype. (And no, that doesn't mean manufacturers have to wait 70'000h+ to characterize MTTF -- it is characterized much earlier using techniques to speed up the working hours.)